Commit Graph

505185 Commits

Author SHA1 Message Date
Javier Martinez Canillas
4e907ef6bd clk: Replace explicit clk assignment with __clk_hw_set_clk
The change in the clk API to return a per-user clock instance, moved
the clock state to struct clk_core so now the struct clk_hw .core field
is used instead of .clk for most operations.

So for hardware clocks that needs to share the same clock state, both
the .core and .clk pointers have to be assigned but currently only the
.clk is set. This leads to NULL pointer dereference when the operations
try to access the hw clock .core. For example, the composite clock rate
and mux components didn't have a .core set which leads to this error:

Unable to handle kernel NULL pointer dereference at virtual address 00000034
pgd = c0004000
[00000034] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-next-20150211-00002-g1fb7f0e1150d #423
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
task: ee480000 ti: ee488000 task.ti: ee488000
PC is at clk_mux_determine_rate_flags+0x14/0x19c
LR is at __clk_mux_determine_rate+0x24/0x2c
pc : [<c03a355c>]    lr : [<c03a3734>]    psr: a0000113
sp : ee489ce8  ip : ee489d84  fp : ee489d84
r10: 0000005c  r9 : 00000001  r8 : 016e3600
r7 : 00000000  r6 : 00000000  r5 : ee442200  r4 : ee440c98
r3 : ffffffff  r2 : 00000000  r1 : 016e3600  r0 : ee440c98
Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5387d  Table: 4000406a  DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xee488210)
Stack: (0xee489ce8 to 0xee48a000)
9ce0:                   00000000 ffffffff 60000113 ee440c98 ee442200 00000000
9d00: 016e3600 ffffffff 00000001 0000005c ee489d84 c03a3734 ee489d80 ee489d84
9d20: 00000000 c048b130 00000400 c03a5798 ee489d80 ee489d84 c0607f60 ffffffea
9d40: 00000001 00000001 ee489d5c c003f844 c06e3340 ee402680 ee440d0c ed935000
9d60: 016e3600 00000003 00000001 0000005c eded3700 c03a11a0 ee489d80 ee489d84
9d80: 016e3600 ee402680 c05b413a eddc9900 016e3600 c03a1228 00000000 ffffffff
9da0: ffffffff eddc9900 016e3600 c03a1c1c ffffffff 016e3600 ed8c6710 c03d6ce4
9dc0: eded3400 00000000 00000000 c03c797c 00000001 0000005c eded3700 eded3700
9de0: 000005e0 00000001 0000005c c03db8ac c06e7e54 c03c8f08 00000000 c06e7e64
9e00: c06b6e74 c06e7f64 000005e0 c06e7df8 c06e5100 00000000 c06e7e6c c06e7f54
9e20: 00000000 00000000 eebd9550 00000000 c06e7da0 c06e7e54 ee7b5010 c06e7da0
9e40: eddc9690 c06e7db4 c06b6e74 00000097 00000000 c03d4398 00000000 ee7b5010
9e60: eebd9550 c06e7da0 00000000 c03db824 ee7b5010 fffffffe c06e7db4 c0299c7c
9e80: ee7b5010 c072a05c 00000000 c0298858 ee7b5010 c06e7db4 ee7b5044 00000000
9ea0: eddc9580 c0298a04 c06e7db4 00000000 c0298978 c02971d4 ee405c78 ee732b40
9ec0: c06e7db4 eded3800 c06d6738 c0298044 c0608300 c06e7db4 00000000 c06e7db4
9ee0: 00000000 c06beb58 c06beb58 c0299024 00000000 c068dd00 00000000 c0008944
9f00: 00000038 c049013c ee462200 c0711920 ee480000 60000113 c06c2cb0 00000000
9f20: 00000000 c06c2cb0 60000113 00000000 ef7fcafc 00000000 c0640194 c00389ec
9f40: c05ec3a8 c063f824 00000006 00000006 c06c2c50 c0696444 00000006 c0696424
9f60: c06ee1c0 c066b588 c06b6e74 00000097 00000000 c066bd44 00000006 00000006
9f80: c066b588 c003d684 00000000 c0481938 00000000 00000000 00000000 00000000
9fa0: 00000000 c0481940 00000000 c000e680 00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[<c03a355c>] (clk_mux_determine_rate_flags) from [<c03a3734>] (__clk_mux_determine_rate+0x24/0x2c)
[<c03a3734>] (__clk_mux_determine_rate) from [<c03a5798>] (clk_composite_determine_rate+0xbc/0x238)
[<c03a5798>] (clk_composite_determine_rate) from [<c03a11a0>] (clk_core_round_rate_nolock+0x5c/0x9c)
[<c03a11a0>] (clk_core_round_rate_nolock) from [<c03a1228>] (__clk_round_rate+0x38/0x40)
[<c03a1228>] (__clk_round_rate) from [<c03a1c1c>] (clk_round_rate+0x20/0x38)
[<c03a1c1c>] (clk_round_rate) from [<c03d6ce4>] (max98090_dai_set_sysclk+0x34/0x118)
[<c03d6ce4>] (max98090_dai_set_sysclk) from [<c03c797c>] (snd_soc_dai_set_sysclk+0x38/0x80)
[<c03c797c>] (snd_soc_dai_set_sysclk) from [<c03db8ac>] (snow_late_probe+0x24/0x48)
[<c03db8ac>] (snow_late_probe) from [<c03c8f08>] (snd_soc_register_card+0xf04/0x1070)
[<c03c8f08>] (snd_soc_register_card) from [<c03d4398>] (devm_snd_soc_register_card+0x30/0x64)
[<c03d4398>] (devm_snd_soc_register_card) from [<c03db824>] (snow_probe+0x68/0xcc)
[<c03db824>] (snow_probe) from [<c0299c7c>] (platform_drv_probe+0x48/0x98)
[<c0299c7c>] (platform_drv_probe) from [<c0298858>] (driver_probe_device+0x114/0x234)
[<c0298858>] (driver_probe_device) from [<c0298a04>] (__driver_attach+0x8c/0x90)
[<c0298a04>] (__driver_attach) from [<c02971d4>] (bus_for_each_dev+0x54/0x88)
[<c02971d4>] (bus_for_each_dev) from [<c0298044>] (bus_add_driver+0xd8/0x1cc)
[<c0298044>] (bus_add_driver) from [<c0299024>] (driver_register+0x78/0xf4)
[<c0299024>] (driver_register) from [<c0008944>] (do_one_initcall+0x80/0x1d0)
[<c0008944>] (do_one_initcall) from [<c066bd44>] (kernel_init_freeable+0x10c/0x1d8)
[<c066bd44>] (kernel_init_freeable) from [<c0481940>] (kernel_init+0x8/0xe4)
[<c0481940>] (kernel_init) from [<c000e680>] (ret_from_fork+0x14/0x34)
Code: e24dd00c e5907000 e1a08001 e88d000c (e5970034)

The changes were made using the following cocinelle semantic patch:

@i@
@@

@depends on i@
identifier dst;
@@

- dst->clk = hw->clk;
+ __clk_hw_set_clk(dst, hw);

@depends on i@
identifier dst;
@@

- dst->hw.clk = hw->clk;
+ __clk_hw_set_clk(&dst->hw, hw);

Fixes: 035a61c314 ("clk: Make clk API return per-user struct clk instances")
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-02-18 09:40:11 -08:00
Javier Martinez Canillas
2e65d8bfe8 clk: Add __clk_hw_set_clk helper function
After the clk API change to return a per-user clock instance, both the
struct clk_core and struct clk pointers from the hw clock needs to be
assigned to clock that share the same state.

In the future the struct clk_core will be removed and this is going to
change again so to avoid having to change the assignments twice in all
the drivers, add a helper function to have an indirection level.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-02-18 09:40:07 -08:00
Javier Martinez Canillas
9e0ad7d28a clk: Don't dereference parent clock if is NULL
The clock passed as an argument to clk_mux_determine_rate_flags()
has the CLK_SET_RATE_PARENT flag set but it has no parent, then a
NULL pointer will tried to be dereferenced.

This shouldn't happen since setting that flag for a clock with no
parent is a bug but the core should be robust to handle that case.

Fixes: 035a61c314 ("clk: Make clk API return per-user struct clk instances")
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-02-18 09:40:01 -08:00
Tomeu Vizoso
69b59cb817 MIPS: Alchemy: Remove bogus args from alchemy_clk_fgcs_detr
They were added to this function by mistake when they were added to the
clk_ops.determine_rate callback.

Fixes: 1c8e600440 ("clk: Add rate constraints to clocks")
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
2015-02-18 09:39:37 -08:00
Linus Torvalds
53861af9a1 OK, this has the big virtio 1.0 implementation, as specified by OASIS.
On top of tht is the major rework of lguest, to use PCI and virtio 1.0, to
 double-check the implementation.
 
 Then comes the inevitable fixes and cleanups from that work.
 
 Thanks,
 Rusty.
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Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull virtio updates from Rusty Russell:
 "OK, this has the big virtio 1.0 implementation, as specified by OASIS.

  On top of tht is the major rework of lguest, to use PCI and virtio
  1.0, to double-check the implementation.

  Then comes the inevitable fixes and cleanups from that work"

* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (80 commits)
  virtio: don't set VIRTIO_CONFIG_S_DRIVER_OK twice.
  virtio_net: unconditionally define struct virtio_net_hdr_v1.
  tools/lguest: don't use legacy definitions for net device in example launcher.
  virtio: Don't expose legacy net features when VIRTIO_NET_NO_LEGACY defined.
  tools/lguest: use common error macros in the example launcher.
  tools/lguest: give virtqueues names for better error messages
  tools/lguest: more documentation and checking of virtio 1.0 compliance.
  lguest: don't look in console features to find emerg_wr.
  tools/lguest: don't start devices until DRIVER_OK status set.
  tools/lguest: handle indirect partway through chain.
  tools/lguest: insert driver references from the 1.0 spec (4.1 Virtio Over PCI)
  tools/lguest: insert device references from the 1.0 spec (4.1 Virtio Over PCI)
  tools/lguest: rename virtio_pci_cfg_cap field to match spec.
  tools/lguest: fix features_accepted logic in example launcher.
  tools/lguest: handle device reset correctly in example launcher.
  virtual: Documentation: simplify and generalize paravirt_ops.txt
  lguest: remove NOTIFY call and eventfd facility.
  lguest: remove NOTIFY facility from demonstration launcher.
  lguest: use the PCI console device's emerg_wr for early boot messages.
  lguest: always put console in PCI slot #1.
  ...
2015-02-18 09:24:01 -08:00
Linus Torvalds
5c2770079f Changes to existing drivers:
- Repair platform device collision; da9052, wm8994-core
   - Regmap configuration amendments; tps65218
   - Fix runtime PM deadlock; rtsx_usb
   - Remove unused/superfluous code; db8500-prcmu, omap-usb-host
   - Enable watchdog timer; lpc_sch
   - Add start/stop RX URBs helpers; dln2
   - Remove platform device (DT only); max77686, max77802
   - Support suspend and resume; dln2
   - Add Device Tree support; da9063
   - Supply extra error checking; intel_soc_pmic
   - Constify all the things; 88pm860x, hi6421-pmic, intel_soc_pmic,
                              max77686, lm3533, retu, pcf50633,
                              davinci_voicecodec, smsc-ece1099,
                              tps65218, mc13xxx, tps65217, twl-core,
                              twl6040
 New drivers/supported devices:
   - Supply new driver for Richtek RT5033
   - Supply new driver for DA9150 Charger and FuelGauge
   - Supply new driver for Qualcomm Resource Power Manager (RPM)
   - Add support for the ir-clk into sun6i-prcm
   - Add support for FuelGauge into axp20x
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Merge tag 'mfd-for-linus-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "Changes to existing drivers:
   - fixr platform device collision; da9052, wm8994-core
   - regmap configuration amendments; tps65218
   - fix runtime PM deadlock; rtsx_usb
   - remove unused/superfluous code; db8500-prcmu, omap-usb-host
   - enable watchdog timer; lpc_sch
   - add start/stop RX URBs helpers; dln2
   - remove platform device (DT only); max77686, max77802
   - support suspend and resume; dln2
   - add Device Tree support; da9063
   - extra error checking; intel_soc_pmic
   - const'ify all the things; 88pm860x, hi6421-pmic, intel_soc_pmic,
                               max77686, lm3533, retu, pcf50633,
                               davinci_voicecodec, smsc-ece1099,
                               tps65218, mc13xxx, tps65217, twl-core,
                               twl6040

  New drivers/supported devices:
   - new driver for Richtek RT5033
   - new driver for DA9150 Charger and FuelGauge
   - new driver for Qualcomm Resource Power Manager (RPM)
   - add support for the ir-clk into sun6i-prcm
   - add support for FuelGauge into axp20x"

* tag 'mfd-for-linus-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (32 commits)
  mfd: intel_soc_pmic: Add missing error check for devm_kzalloc
  mfd: rtsx_usb: Defer autosuspend while card exists
  mfd: devicetree: Add bindings for DA9063
  mfd: da9063: Add device tree support
  regulator: qcom-rpm: Add missing state flag in call to RPM
  mfd: qcom-rpm: Driver for the Qualcomm RPM
  mfd: devicetree: bindings: Add Qualcomm RPM DT binding
  mfd: max77686/802: Remove support for board files
  mfd: omap-usb-host: Remove some unused functions
  mfd: twl6040: Constify struct regmap_config and reg_default array
  mfd: twl-core: Constify struct regmap_config and reg_default array
  mfd: tps65217: Constify struct regmap_config
  mfd: mc13xxx: i2c/spi: Constify struct regmap_config
  mfd: tps65218: Constify struct regmap_config
  mfd: smsc-ece1099: Constify struct regmap_config
  mfd: davinci_voicecodec: Constify struct regmap_config
  mfd: pcf50633: Constify struct regmap_config
  mfd: retu: Constify struct regmap_config
  mfd: lm3533: Constify struct regmap_config
  mfd: max77686: Constify struct regmap_config
  ...
2015-02-18 09:05:48 -08:00
Linus Torvalds
9a8b2aa534 pwm: Changes for v3.20-rc1
This contains two new drivers, one for Allwinner SoCs and the other for
 Imagination Technologies' Pistachio SoC.
 
 Complementing this are a couple of fixes to the Atmel HLCDC PWM and STi
 PWM drivers as well as minor cleanups to the core and the Tegra driver.
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Merge tag 'pwm/for-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

Pull pwm updates from Thierry Reding:
 "This contains two new drivers, one for Allwinner SoCs and the other
  for Imagination Technologies' Pistachio SoC.

  Complementing this are a couple of fixes to the Atmel HLCDC PWM and
  STi PWM drivers as well as minor cleanups to the core and the Tegra
  driver"

* tag 'pwm/for-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
  pwm: tegra: Use NSEC_PER_SEC
  pwm: Remove unnecessary check before of_node_put()
  pwm: Add device tree binding document for IMG PWM DAC
  pwm: Imagination Technologies PWM DAC driver
  pwm: sti: Maintain a bitmap of configured devices
  pwm: sunxi: document OF bindings
  pwm: Add Allwinner SoC support
  pwm: atmel-hlcdc: Prevent division by zero
  pwm: atmel-hlcdc: Depend on HAVE_CLK
2015-02-18 09:00:53 -08:00
Ingo Molnar
3b3336d4fe Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/urgent
Pull RCU fix from Paul E. McKenney.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 17:59:20 +01:00
Linus Torvalds
ce1d3fde87 Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
 "This update brings:

   - the big cleanup up by Maxime for device control and slave
     capabilities.  This makes the API much cleaner.

   - new IMG MDC driver by Andrew

   - new Renesas R-Car Gen2 DMA Controller driver by Laurent along with
     bunch of fixes on rcar drivers

   - odd fixes and updates spread over driver"

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits)
  dmaengine: pl330: add DMA_PAUSE feature
  dmaengine: pl330: improve pl330_tx_status() function
  dmaengine: rcar-dmac: Disable channel 0 when using IOMMU
  dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata
  dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device
  dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR
  dmaengine: rcar-dmac: Fix spinlock issues in interrupt
  dmaenegine: edma: fix sparse warnings
  dmaengine: rcar-dmac: Fix uninitialized variable usage
  dmaengine: shdmac: extend PM methods
  dmaengine: shdmac: use SET_RUNTIME_PM_OPS()
  dmaengine: pl330: fix bug that cause start the same descs in cyclic
  dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers
  dmaengine: at_xdmac: simplify channel configuration stuff
  dmaengine: at_xdmac: introduce save_cc field
  dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel
  ioat: fail self-test if wait_for_completion times out
  dmaengine: dw: define DW_DMA_MAX_NR_MASTERS
  dmaengine: dw: amend description of dma_dev field
  dmatest: move src_off, dst_off, len inside loop
  ...
2015-02-18 08:49:20 -08:00
Linus Torvalds
928fce2f6d Merge git://www.linux-watchdog.org/linux-watchdog
Pull watchdog updates from Wim Van Sebroeck:
 "This adds the following new drivers:

   - ImgTec PDC Watchdog Timer Driver,
   - Mediatek SoC integrated watchdog

  Add support for BCM5301X, IT8783, NCT6791 and NCT6792 WDT's

  Add bcm47xx_wdt and da9063 restart handlers and contains overall
  improvements and fixes"

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: bcm47xx_wdt.c: allow enabling on BCM5301X arch
  watchdog: jz4740: Add DT support
  dt: watchdog: Add DT binding documentation for jz4740 watchdog timer
  watchdog: dw_wdt: Try to get a 30 second watchdog by default
  watchdog: dw_wdt: pat the watchdog before enabling it
  watchdog: w83627hf_wdt: Add support for NCT6791 and NCT6792
  watchdog: bcm47xx_wdt.c: add restart handler support
  watchdog: gpio_wdt: Add "always_running" feature to GPIO watchdog
  watchdog: da9063: Add restart handler support
  ARM: mediatek: dts: Add bindings for watchdog
  watchdog: Add driver for Mediatek watchdog
  watchdog: Fix omap watchdogs to enable the magic close bit
  watchdog: rt2880_wdt: minor clean up
  watchdog: hpwdt: Fix initialization message in hpwdt.c
  watchdog: it87_wdt: add IT8783 ID
  watchdog: imx2: Constify struct regmap_config and watchdog_ops
  DT: watchdog: Add ImgTec PDC Watchdog Timer binding documentation
  watchdog: ImgTec PDC Watchdog Timer Driver
2015-02-18 08:42:47 -08:00
Linus Torvalds
a5ac1fb13c IEEE 1394 subsystem updates:
- Replace made-up, unallocated Vendor and Model values of firewire-core's
     Configuration ROM register root directory by properly registered IDs.
     (These IDs are visible to peer nodes on the bus and locally via sysfs,
     but they are not involved in protocol matching or driver matching, nor
     are they used in stock udev rules.)
 
   - Remove some unneccessary code.
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Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull fireware updates from Stefan Richter:
 "IEEE 1394 subsystem updates:

   - Replace made-up, unallocated Vendor and Model values of
     firewire-core's Configuration ROM register root directory by
     properly registered IDs.  (These IDs are visible to peer nodes on
     the bus and locally via sysfs, but they are not involved in
     protocol matching or driver matching, nor are they used in stock
     udev rules)

   - Remove some unneccessary code"

* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: core: use correct vendor/model IDs
  firewire: sbp2: remove redundant check for bidi command
  firewire: ohci: Remove unused function
2015-02-18 08:22:38 -08:00
Linus Torvalds
402521b8f7 MTD updates for 3.20-rc1
NAND:
 
  * Add new Hisilicon NAND driver for Hip04
  * Add default reboot handler, to ensure all outstanding erase transactions
    complete in time
  * jz4740: convert to use GPIO descriptor API
  * Atmel: add support for sama5d4
  * Change default bitflip threshold to 75% of correction strength
  * Miscellaneous cleanups and bugfixes
 
 SPI NOR:
 
  * Freescale QuadSPI:
    - Fix a few probe() and remove() issues
    - Add a MAINTAINERS entry for this driver
    - Tweak transfer size to increase read performance
    - Add suspend/resume support
  * Add Micron quad I/O support
  * ST FSM SPI: miscellaneous fixes
 
 JFFS2:
 
  * gracefully handle corrupted 'offset' field found on flash
 
 Other:
 
  * bcm47xxpart: add tweaks for a few new devices
  * mtdconcat: set return lengths properly for mtd_write_oob()
  * map_ram: enable use with mtdoops
  * maps: support fallback to ROM/UBI for write-protected NOR flash
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Merge tag 'for-linus-20150216' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "NAND:

   - Add new Hisilicon NAND driver for Hip04
   - Add default reboot handler, to ensure all outstanding erase
     transactions complete in time
   - jz4740: convert to use GPIO descriptor API
   - Atmel: add support for sama5d4
   - Change default bitflip threshold to 75% of correction strength
   - Miscellaneous cleanups and bugfixes

  SPI NOR:

   - Freescale QuadSPI:
   - Fix a few probe() and remove() issues
   - Add a MAINTAINERS entry for this driver
   - Tweak transfer size to increase read performance
   - Add suspend/resume support
   - Add Micron quad I/O support
   - ST FSM SPI: miscellaneous fixes

  JFFS2:

   - gracefully handle corrupted 'offset' field found on flash

  Other:

   - bcm47xxpart: add tweaks for a few new devices
   - mtdconcat: set return lengths properly for mtd_write_oob()
   - map_ram: enable use with mtdoops
   - maps: support fallback to ROM/UBI for write-protected NOR flash"

* tag 'for-linus-20150216' of git://git.infradead.org/linux-mtd: (46 commits)
  mtd: hisilicon: && vs & typo
  jffs2: fix handling of corrupted summary length
  mtd: hisilicon: add device tree binding documentation
  mtd: hisilicon: add a new NAND controller driver for hisilicon hip04 Soc
  mtd: avoid registering reboot notifier twice
  mtd: concat: set the return lengths properly
  mtd: kconfig: replace PPC_OF with PPC
  mtd: denali: remove unnecessary stubs
  mtd: nand: remove redundant local variable
  MAINTAINERS: add maintainer entry for FREESCALE QUAD SPI driver
  mtd: fsl-quadspi: improve read performance by increase AHB transfer size
  mtd: fsl-quadspi: Remove unnecessary 'map_failed' label
  mtd: fsl-quadspi: Remove unneeded success/error messages
  mtd: fsl-quadspi: Fix the error paths
  mtd: nand: omap: drop condition with no effect
  mtd: nand: jz4740: Convert to GPIO descriptor API
  mtd: nand: Request strength instead of bytes for soft BCH
  mtd: nand: default bitflip-reporting threshold to 75% of correction strength
  mtd: atmel_nand: introduce a new compatible string for sama5d4 chip
  mtd: atmel_nand: return max bitflips in all sectors in pmecc_correction()
  ...
2015-02-18 08:01:44 -08:00
Peter Zijlstra
2636ed5f8d sched/rt: Avoid obvious configuration fail
Setting the root group's cpu.rt_runtime_us to 0 is a bad thing; it
would disallow the kernel creating RT tasks.

One can of course still set it to 1, which will (likely) still wreck
your kernel, but at least make it clear that setting it to 0 is not
good.

Collect both sanity checks into the one place while we're there.

Suggested-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150209112715.GO24151@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 16:17:23 +01:00
Peter Zijlstra
1fe89e1b6d sched/autogroup: Fix failure to set cpu.rt_runtime_us
Because task_group() uses a cache of autogroup_task_group(), whose
output depends on sched_class, switching classes can generate
problems.

In particular, when started as fair, the cache points to the
autogroup, so when switching to RT the tg_rt_schedulable() test fails
for every cpu.rt_{runtime,period}_us change because now the autogroup
has tasks and no runtime.

Furthermore, going back to the previous semantics of varying
task_group() with sched_class has the down-side that the sched_debug
output varies as well, even though the task really is in the
autogroup.

Therefore add an autogroup exception to tg_has_rt_tasks() -- such that
both (all) task_group() usages in sched/core now have one. And remove
all the remnants of the variable task_group() output.

Reported-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Stefan Bader <stefan.bader@canonical.com>
Fixes: 8323f26ce3 ("sched: Fix race in task_group()")
Link: http://lkml.kernel.org/r/20150209112237.GR5029@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 16:17:20 +01:00
Kirill Tkhai
6f1607f1bd sched/dl: Do update_rq_clock() in yield_task_dl()
update_curr_dl() needs actual rq clock.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1423040972.18770.10.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 16:17:12 +01:00
Joerg Roedel
d97eb8966c x86/irq: Check for valid irq descriptor in check_irq_vectors_for_cpu_disable()
When an interrupt is migrated away from a cpu it will stay
in its vector_irq array until smp_irq_move_cleanup_interrupt
succeeded. The cfg->move_in_progress flag is cleared already
when the IPI was sent.

When the interrupt is destroyed after migration its 'struct
irq_desc' is freed and the vector_irq arrays are cleaned up.
But since cfg->move_in_progress is already 0 the references
at cpus before the last migration will not be cleared. So
this would leave a reference to an already destroyed irq
alive.

When the cpu is taken down at this point, the
check_irq_vectors_for_cpu_disable() function finds a valid irq
number in the vector_irq array, but gets NULL for its
descriptor and dereferences it, causing a kernel panic.

This has been observed on real systems at shutdown. Add a
check to check_irq_vectors_for_cpu_disable() for a valid
'struct irq_desc' to prevent this issue.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: alnovak@suse.com
Cc: joro@8bytes.org
Link: http://lkml.kernel.org/r/20150204132754.GA10078@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 15:01:42 +01:00
Jiang Liu
1ea76fbadd x86/irq: Fix regression caused by commit b568b8601f
Commit b568b8601f ("Treat SCI interrupt as normal GSI interrupt")
accidently removes support of legacy PIC interrupt when fixing a
regression for Xen, which causes a nasty regression on HP/Compaq
nc6000 where we fail to register the ACPI interrupt, and thus
lose eg. thermal notifications leading a potentially overheated
machine.

So reintroduce support of legacy PIC based ACPI SCI interrupt.

Reported-by: Ville Syrjälä <syrjala@sci.fi>
Tested-by: Ville Syrjälä <syrjala@sci.fi>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: <stable@vger.kernel.org> # 3.19+
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Sander Eikelenboom <linux@eikelenboom.it>
Cc: linux-pm@vger.kernel.org
Link: http://lkml.kernel.org/r/1424052673-22974-1-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 15:01:41 +01:00
Raghavendra K T
d6abfdb202 x86/spinlocks/paravirt: Fix memory corruption on unlock
Paravirt spinlock clears slowpath flag after doing unlock.
As explained by Linus currently it does:

                prev = *lock;
                add_smp(&lock->tickets.head, TICKET_LOCK_INC);

                /* add_smp() is a full mb() */

                if (unlikely(lock->tickets.tail & TICKET_SLOWPATH_FLAG))
                        __ticket_unlock_slowpath(lock, prev);

which is *exactly* the kind of things you cannot do with spinlocks,
because after you've done the "add_smp()" and released the spinlock
for the fast-path, you can't access the spinlock any more.  Exactly
because a fast-path lock might come in, and release the whole data
structure.

Linus suggested that we should not do any writes to lock after unlock(),
and we can move slowpath clearing to fastpath lock.

So this patch implements the fix with:

 1. Moving slowpath flag to head (Oleg):
    Unlocked locks don't care about the slowpath flag; therefore we can keep
    it set after the last unlock, and clear it again on the first (try)lock.
    -- this removes the write after unlock. note that keeping slowpath flag would
    result in unnecessary kicks.
    By moving the slowpath flag from the tail to the head ticket we also avoid
    the need to access both the head and tail tickets on unlock.

 2. use xadd to avoid read/write after unlock that checks the need for
    unlock_kick (Linus):
    We further avoid the need for a read-after-release by using xadd;
    the prev head value will include the slowpath flag and indicate if we
    need to do PV kicking of suspended spinners -- on modern chips xadd
    isn't (much) more expensive than an add + load.

Result:
 setup: 16core (32 cpu +ht sandy bridge 8GB 16vcpu guest)
 benchmark overcommit %improve
 kernbench  1x           -0.13
 kernbench  2x            0.02
 dbench     1x           -1.77
 dbench     2x           -0.63

[Jeremy: Hinted missing TICKET_LOCK_INC for kick]
[Oleg: Moved slowpath flag to head, ticket_equals idea]
[PeterZ: Added detailed changelog]

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Cc: Andrew Jones <drjones@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Fernando Luis Vázquez Cao <fernando_b1@lab.ntt.co.jp>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Waiman Long <Waiman.Long@hp.com>
Cc: a.ryabinin@samsung.com
Cc: dave@stgolabs.net
Cc: hpa@zytor.com
Cc: jasowang@redhat.com
Cc: jeremy@goop.org
Cc: paul.gortmaker@windriver.com
Cc: riel@redhat.com
Cc: tglx@linutronix.de
Cc: waiman.long@hp.com
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/20150215173043.GA7471@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:53:49 +01:00
John Stultz
29183a70b0 ntp: Fixup adjtimex freq validation on 32-bit systems
Additional validation of adjtimex freq values to avoid
potential multiplication overflows were added in commit
5e5aeb4367 (time: adjtimex: Validate the ADJ_FREQUENCY values)

Unfortunately the patch used LONG_MAX/MIN instead of
LLONG_MAX/MIN, which was fine on 64-bit systems, but being
much smaller on 32-bit systems caused false positives
resulting in most direct frequency adjustments to fail w/
EINVAL.

ntpd only does direct frequency adjustments at startup, so
the issue was not as easily observed there, but other time
sync applications like ptpd and chrony were more effected by
the bug.

See bugs:

  https://bugzilla.kernel.org/show_bug.cgi?id=92481
  https://bugzilla.redhat.com/show_bug.cgi?id=1188074

This patch changes the checks to use LLONG_MAX for
clarity, and additionally the checks are disabled
on 32-bit systems since LLONG_MAX/PPM_SCALE is always
larger then the 32-bit long freq value, so multiplication
overflows aren't possible there.

Reported-by: Josh Boyer <jwboyer@fedoraproject.org>
Reported-by: George Joseph <george.joseph@fairview5.com>
Tested-by: George Joseph <george.joseph@fairview5.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org> # v3.19+
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Link: http://lkml.kernel.org/r/1423553436-29747-1-git-send-email-john.stultz@linaro.org
[ Prettified the changelog and the comments a bit. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:50:10 +01:00
Ingo Molnar
829bf7af64 * Leave a valid 64-bit IDT installed during runtime EFI mixed mode
calls to avoid triple faults if an NMI/MCE is received.
 
  * Revert Ard's change to the libstub get_memory_map() that went into
    the v3.20 merge window because it causes boot regressions on Qemu and
    Xen.
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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent

Pull EFI fixes from Matt Fleming:

" - Leave a valid 64-bit IDT installed during runtime EFI mixed mode
    calls to avoid triple faults if an NMI/MCE is received.

  - Revert Ard's change to the libstub get_memory_map() that went into
    the v3.20 merge window because it causes boot regressions on Qemu and
    Xen. "

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:40:40 +01:00
NeilBrown
9cff8adeaa sched: Prevent recursion in io_schedule()
io_schedule() calls blk_flush_plug() which, depending on the
contents of current->plug, can initiate arbitrary blk-io requests.

Note that this contrasts with blk_schedule_flush_plug() which requires
all non-trivial work to be handed off to a separate thread.

This makes it possible for io_schedule() to recurse, and initiating
block requests could possibly call mempool_alloc() which, in times of
memory pressure, uses io_schedule().

Apart from any stack usage issues, io_schedule() will not behave
correctly when called recursively as delayacct_blkio_start() does
not allow for repeated calls.

So:
 - use ->in_iowait to detect recursion.  Set it earlier, and restore
   it to the old value.
 - move the call to "raw_rq" after the call to blk_flush_plug().
   As this is some sort of per-cpu thing, we want some chance that
   we are on the right CPU
 - When io_schedule() is called recurively, use blk_schedule_flush_plug()
   which cannot further recurse.
 - as this makes io_schedule() a lot more complex and as io_schedule()
   must match io_schedule_timeout(), but all the changes in io_schedule_timeout()
   and make io_schedule a simple wrapper for that.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
[ Moved the now rudimentary io_schedule() into sched.h. ]
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Tony Battersby <tonyb@cybernetics.com>
Link: http://lkml.kernel.org/r/20150213162600.059fffb2@notabene.brown
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:27:44 +01:00
Oleg Nesterov
bc9560155f sched/completion: Serialize completion_done() with complete()
Commit de30ec4730 "Remove unnecessary ->wait.lock serialization when
reading completion state" was not correct, without lock/unlock the code
like stop_machine_from_inactive_cpu()

	while (!completion_done())
		cpu_relax();

can return before complete() finishes its spin_unlock() which writes to
this memory. And spin_unlock_wait().

While at it, change try_wait_for_completion() to use READ_ONCE().

Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reported-by: Davidlohr Bueso <dave@stgolabs.net>
Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
[ Added a comment with the barrier. ]
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicholas Mc Guire <der.herr@hofr.at>
Cc: raghavendra.kt@linux.vnet.ibm.com
Cc: waiman.long@hp.com
Fixes: de30ec4730 ("sched/completion: Remove unnecessary ->wait.lock serialization when reading completion state")
Link: http://lkml.kernel.org/r/20150212195913.GA30430@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:27:40 +01:00
Frederic Weisbecker
06b1f8083d sched: Fix preempt_schedule_common() triggering tracing recursion
Since the function graph tracer needs to disable preemption, it might
call preempt_schedule() after reenabling  it if something triggered the
need for rescheduling in between.

Therefore we can't trace preempt_schedule() itself because we would
face a function tracing recursion otherwise as the tracer is always
called before PREEMPT_ACTIVE gets set to prevent that recursion. This is
why preempt_schedule() is tagged as "notrace".

But the same issue applies to every function called by preempt_schedule()
before PREEMPT_ACTIVE is actually set. And preempt_schedule_common() is
one such example. Unfortunately we forgot to tag it as notrace as well
and as a result we are encountering tracing recursion since it got
introduced by:

   a18b5d0181 ("sched: Fix missing preemption opportunity")

Let's fix that by applying the appropriate function tag to
preempt_schedule_common().

Reported-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1424110807-15057-1-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:27:38 +01:00
Kirill Tkhai
a79ec89fd8 sched/dl: Prevent enqueue of a sleeping task in dl_task_timer()
A deadline task may be throttled and dequeued at the same time.
This happens, when it becomes throttled in schedule(), which
is called to go to sleep:

current->state = TASK_INTERRUPTIBLE;
schedule()
    deactivate_task()
        dequeue_task_dl()
            update_curr_dl()
                start_dl_timer()
            __dequeue_task_dl()
    prev->on_rq = 0;

Later the timer fires, but the task is still dequeued:

dl_task_timer()
    enqueue_task_dl() /* queues on dl_rq; on_rq remains 0 */

Someone wakes it up:

try_to_wake_up()

    enqueue_dl_entity()
        BUG_ON(on_dl_rq())

Patch fixes this problem, it prevents queueing !on_rq tasks
on dl_rq.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
[ Wrote comment. ]
Cc: Juri Lelli <juri.lelli@arm.com>
Fixes: 1019a359d3 ("sched/deadline: Fix stale yield state")
Link: http://lkml.kernel.org/r/1374601424090314@web4j.yandex.ru
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:27:31 +01:00
Peter Zijlstra
3960c8c0c7 sched: Make dl_task_time() use task_rq_lock()
Kirill reported that a dl task can be throttled and dequeued at the
same time. This happens, when it becomes throttled in schedule(),
which is called to go to sleep:

current->state = TASK_INTERRUPTIBLE;
schedule()
    deactivate_task()
        dequeue_task_dl()
            update_curr_dl()
                start_dl_timer()
            __dequeue_task_dl()
    prev->on_rq = 0;

This invalidates the assumption from commit 0f397f2c90 ("sched/dl:
Fix race in dl_task_timer()"):

  "The only reason we don't strictly need ->pi_lock now is because
   we're guaranteed to have p->state == TASK_RUNNING here and are
   thus free of ttwu races".

And therefore we have to use the full task_rq_lock() here.

This further amends the fact that we forgot to update the rq lock loop
for TASK_ON_RQ_MIGRATE, from commit cca26e8009 ("sched: Teach
scheduler to understand TASK_ON_RQ_MIGRATING state").

Reported-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@arm.com>
Link: http://lkml.kernel.org/r/20150217123139.GN5029@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:27:30 +01:00
Peter Zijlstra
74b8a4cb6c sched: Clarify ordering between task_rq_lock() and move_queued_task()
There was a wee bit of confusion around the exact ordering here;
clarify things.

Reported-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20150217121258.GM5029@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 14:27:28 +01:00
Matt Fleming
43a9f69692 Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes"
This reverts commit d1a8d66b91.

Ard reported a boot failure when running UEFI under Qemu and Xen and
experimenting with various Tianocore build options,

 "As it turns out, when allocating room for the UEFI memory map using
  UEFI's AllocatePool (), it may result in two new memory map entries
  being created, for instance, when using Tianocore's preallocated region
  feature. For example, the following region

  0x00005ead5000-0x00005ebfffff [Conventional Memory|   |  |  |  |  |WB|WT|WC|UC]

  may be split like this

  0x00005ead5000-0x00005eae2fff [Conventional Memory|   |  |  |  |  |WB|WT|WC|UC]
  0x00005eae3000-0x00005eae4fff [Loader Data        |   |  |  |  |  |WB|WT|WC|UC]
  0x00005eae5000-0x00005ebfffff [Conventional Memory|   |  |  |  |  |WB|WT|WC|UC]

  if the preallocated Loader Data region was chosen to be right in the
  middle of the original free space.

  After patch d1a8d66b91 ("efi/libstub: Call get_memory_map() to
  obtain map and desc sizes"), this is not being dealt with correctly
  anymore, as the existing logic to allocate room for a single additional
  entry has become insufficient."

Mark requested to reinstate the old loop we had before commit
d1a8d66b91, which grows the memory map buffer until it's big enough to
hold the EFI memory map.

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2015-02-18 11:38:13 +00:00
Sebastian Andrzej Siewior
8d1e5a1a1c locking/rtmutex: Avoid a NULL pointer dereference on deadlock
With task_blocks_on_rt_mutex() returning early -EDEADLK we never
add the waiter to the waitqueue. Later, we try to remove it via
remove_waiter() and go boom in rt_mutex_top_waiter() because
rb_entry() gives a NULL pointer.

( Tested on v3.18-RT where rtmutex is used for regular mutex and I
  tried to get one twice in a row. )

Not sure when this started but I guess 397335f004 ("rtmutex: Fix
deadlock detector for real") or commit 3d5c9340d1 ("rtmutex:
Handle deadlock detection smarter").

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org> # for v3.16 and later kernels
Link: http://lkml.kernel.org/r/1424187823-19600-1-git-send-email-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-02-18 10:20:32 +01:00
Thierry Reding
b65af27ad8 pwm: tegra: Use NSEC_PER_SEC
Instead of using the literal value for the number of nanoseconds per
second, use the macro instead to increase readability.

Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-02-18 08:40:29 +01:00
Linus Torvalds
f5af19d10d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking updates from David Miller:

 1) Missing netlink attribute validation in nft_lookup, from Patrick
    McHardy.

 2) Restrict ipv6 partial checksum handling to UDP, since that's the
    only case it works for.  From Vlad Yasevich.

 3) Clear out silly device table sentinal macros used by SSB and BCMA
    drivers.  From Joe Perches.

 4) Make sure the remote checksum code never creates a situation where
    the remote checksum is applied yet the tunneling metadata describing
    the remote checksum transformation is still present.  Otherwise an
    external entity might see this and apply the checksum again.  From
    Tom Herbert.

 5) Use msecs_to_jiffies() where applicable, from Nicholas Mc Guire.

 6) Don't explicitly initialize timer struct fields, use setup_timer()
    and mod_timer() instead.  From Vaishali Thakkar.

 7) Don't invoke tg3_halt() without the tp->lock held, from Jun'ichi
    Nomura.

 8) Missing __percpu annotation in ipvlan driver, from Eric Dumazet.

 9) Don't potentially perform skb_get() on shared skbs, also from Eric
    Dumazet.

10) Fix COW'ing of metrics for non-DST_HOST routes in ipv6, from Martin
    KaFai Lau.

11) Fix merge resolution error between the iov_iter changes in vhost and
    some bug fixes that occurred at the same time.  From Jason Wang.

12) If rtnl_configure_link() fails we have to perform a call to
    ->dellink() before unregistering the device.  From WANG Cong.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (39 commits)
  net: dsa: Set valid phy interface type
  rtnetlink: call ->dellink on failure when ->newlink exists
  com20020-pci: add support for eae single card
  vhost_net: fix wrong iter offset when setting number of buffers
  net: spelling fixes
  net/core: Fix warning while make xmldocs caused by dev.c
  net: phy: micrel: disable NAND-tree for KSZ8021, KSZ8031, KSZ8051, KSZ8081
  ipv6: fix ipv6_cow_metrics for non DST_HOST case
  openvswitch: Fix key serialization.
  r8152: restore hw settings
  hso: fix rx parsing logic when skb allocation fails
  tcp: make sure skb is not shared before using skb_get()
  bridge: netfilter: Move sysctl-specific error code inside #ifdef
  ipv6: fix possible deadlock in ip6_fl_purge / ip6_fl_gc
  ipvlan: add a missing __percpu pcpu_stats
  tg3: Hold tp->lock before calling tg3_halt() from tg3_init_one()
  bgmac: fix device initialization on Northstar SoCs (condition typo)
  qlcnic: Delete existing multicast MAC list before adding new
  net/mlx5_core: Fix configuration of log_uar_page_sz
  sunvnet: don't change gso data on clones
  ...
2015-02-17 17:41:19 -08:00
Linus Torvalds
0d695d6d8b 3 bug md fixes for 3.20
yet-another-livelock in raid5, and a problem with write errors
 to 4K-block devices.
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Merge tag 'md/3.20-fixes' of git://neil.brown.name/md

Pull md bugfixes from Neil Brown:
 "Three bug md fixes for 3.20

  yet-another-livelock in raid5, and a problem with write errors to
  4K-block devices"

* tag 'md/3.20-fixes' of git://neil.brown.name/md:
  md/raid5: Fix livelock when array is both resyncing and degraded.
  md/raid10: round up to bdev_logical_block_size in narrow_write_error.
  md/raid1: round up to bdev_logical_block_size in narrow_write_error
2015-02-17 17:34:21 -08:00
Linus Torvalds
d96c757efa Fix regression - functions on the mce notifier chain should
not be able to decide that an event should not be logged
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Merge tag 'please-pull-fixmcelog' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

Pull mcelog regression fix from Tony Luck:
 "Fix regression - functions on the mce notifier chain should not be
  able to decide that an event should not be logged"

* tag 'please-pull-fixmcelog' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  x86/mce: Fix regression. All error records should report via /dev/mcelog
2015-02-17 17:03:07 -08:00
Linus Torvalds
fbe4da49f8 Fix the DocBook build failure caused by the move of the i2o subsystem to
the staging tree.
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Merge tag 'docs-fix' of git://git.lwn.net/linux-2.6

Pull DocBook build fix from Jonathan Corbet:
 "Fix the DocBook build failure caused by the move of the i2o subsystem
  to the staging tree"

* tag 'docs-fix' of git://git.lwn.net/linux-2.6:
  Fix docs build failure caused by i2o removal
2015-02-17 17:02:04 -08:00
Linus Torvalds
533cf7aef2 Merge branch 'for-3.20' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from Bruce Fields:
 "These are fixes for two bugs introduced during the merge window"

* 'for-3.20' of git://linux-nfs.org/~bfields/linux:
  nfsd4: fix v3-less build
  nfsd: fix comparison in fh_fsid_match()
2015-02-17 17:00:54 -08:00
NeilBrown
26ac107378 md/raid5: Fix livelock when array is both resyncing and degraded.
Commit a7854487cd:
  md: When RAID5 is dirty, force reconstruct-write instead of read-modify-write.

Causes an RCW cycle to be forced even when the array is degraded.
A degraded array cannot support RCW as that requires reading all data
blocks, and one may be missing.

Forcing an RCW when it is not possible causes a live-lock and the code
spins, repeatedly deciding to do something that cannot succeed.

So change the condition to only force RCW on non-degraded arrays.

Reported-by: Manibalan P <pmanibalan@amiindia.co.in>
Bisected-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Tested-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Fixes: a7854487cd
Cc: stable@vger.kernel.org (v3.7+)
2015-02-18 11:35:14 +11:00
Linus Torvalds
038911597e Merge branch 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull lazytime mount option support from Al Viro:
 "Lazytime stuff from tytso"

* 'lazytime' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ext4: add optimization for the lazytime mount option
  vfs: add find_inode_nowait() function
  vfs: add support for a lazytime mount option
2015-02-17 16:12:34 -08:00
Linus Torvalds
66dc830d14 Merge branch 'iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull iov_iter updates from Al Viro:
 "More iov_iter work - missing counterpart of iov_iter_init() for
  bvec-backed ones and vfs_read_iter()/vfs_write_iter() - wrappers for
  sync calls of ->read_iter()/->write_iter()"

* 'iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: add vfs_iter_{read,write} helpers
  new helper: iov_iter_bvec()
2015-02-17 15:48:33 -08:00
Linus Torvalds
05016b0f0a Merge branch 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull getname/putname updates from Al Viro:
 "Rework of getname/getname_kernel/etc., mostly from Paul Moore.  Gets
  rid of quite a pile of kludges between namei and audit..."

* 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  audit: replace getname()/putname() hacks with reference counters
  audit: fix filename matching in __audit_inode() and __audit_inode_child()
  audit: enable filename recording via getname_kernel()
  simpler calling conventions for filename_mountpoint()
  fs: create proper filename objects using getname_kernel()
  fs: rework getname_kernel to handle up to PATH_MAX sized filenames
  cut down the number of do_path_lookup() callers
2015-02-17 15:27:47 -08:00
Linus Torvalds
c6b1de1b64 Merge branch 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull debugfs patches from Al Viro:
 "debugfs patches, mostly to make it possible for something like tracefs
  to be transparently automounted on given directory in debugfs.

  New primitive in there is debugfs_create_automount(name, parent, func,
  arg), which creates a directory and makes its ->d_automount() return
  func(arg).  Another missing primitive was debugfs_create_file_size() -
  open-coded in quite a few places.  Dave's patch adds it and converts
  the open-code instances to calling it"

* 'debugfs_automount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  debugfs: Provide a file creation function that also takes an initial size
  new primitive: debugfs_create_automount()
  debugfs: split end_creating() into success and failure cases
  debugfs: take mode-dependent parts of debugfs_get_inode() into callers
  fold debugfs_mknod() into callers
  fold debugfs_create() into caller
  fold debugfs_mkdir() into caller
  debugfs_mknod(): get rid useless arguments
  fold debugfs_link() into caller
  debugfs: kill __create_file()
  debugfs: split the beginning and the end of __create_file() off
  debugfs_{mkdir,create,link}(): get rid of redundant argument
2015-02-17 15:18:19 -08:00
Linus Torvalds
50652963ea Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc VFS updates from Al Viro:
 "This cycle a lot of stuff sits on topical branches, so I'll be sending
  more or less one pull request per branch.

  This is the first pile; more to follow in a few.  In this one are
  several misc commits from early in the cycle (before I went for
  separate branches), plus the rework of mntput/dput ordering on umount,
  switching to use of fs_pin instead of convoluted games in
  namespace_unlock()"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  switch the IO-triggering parts of umount to fs_pin
  new fs_pin killing logics
  allow attaching fs_pin to a group not associated with some superblock
  get rid of the second argument of acct_kill()
  take count and rcu_head out of fs_pin
  dcache: let the dentry count go down to zero without taking d_lock
  pull bumping refcount into ->kill()
  kill pin_put()
  mode_t whack-a-mole: chelsio
  file->f_path.dentry is pinned down for as long as the file is open...
  get rid of lustre_dump_dentry()
  gut proc_register() a bit
  kill d_validate()
  ncpfs: get rid of d_validate() nonsense
  selinuxfs: don't open-code d_genocide()
2015-02-17 14:56:45 -08:00
Linus Torvalds
e2b74f232e Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton:

 - a pile of minor fs fixes and cleanups

 - kexec updates

 - random misc fixes in various places: vmcore, rbtree, eventfd, ipc, seccomp.

 - a series of python-based kgdb helper scripts

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (58 commits)
  seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO
  samples/seccomp: improve label helper
  ipc,sem: use current->state helpers
  scripts/gdb: disable pagination while printing from breakpoint handler
  scripts/gdb: define maintainer
  scripts/gdb: convert CpuList to generator function
  scripts/gdb: convert ModuleList to generator function
  scripts/gdb: use a generator instead of iterator for task list
  scripts/gdb: ignore byte-compiled python files
  scripts/gdb: port to python3 / gdb7.7
  scripts/gdb: add basic documentation
  scripts/gdb: add lx-lsmod command
  scripts/gdb: add class to iterate over CPU masks
  scripts/gdb: add lx_current convenience function
  scripts/gdb: add internal helper and convenience function for per-cpu lookup
  scripts/gdb: add get_gdbserver_type helper
  scripts/gdb: add internal helper and convenience function to retrieve thread_info
  scripts/gdb: add is_target_arch helper
  scripts/gdb: add helper and convenience function to look up tasks
  scripts/gdb: add task iteration class
  ...
2015-02-17 14:35:02 -08:00
Kees Cook
580c57f107 seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO
The value resulting from the SECCOMP_RET_DATA mask could exceed MAX_ERRNO
when setting errno during a SECCOMP_RET_ERRNO filter action.  This makes
sure we have a reliable value being set, so that an invalid errno will not
be ignored by userspace.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Dmitry V. Levin <ldv@altlinux.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Will Drewry <wad@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Kees Cook
3a9af0bd34 samples/seccomp: improve label helper
Fixes a potential corruption with uninitialized stack memory in the
seccomp BPF sample program.

[akpm@linux-foundation.org: coding-style fixlet]
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Robert Swiecki <swiecki@google.com>
Tested-by: Robert Swiecki <swiecki@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Davidlohr Bueso
52644c9ab3 ipc,sem: use current->state helpers
Call __set_current_state() instead of assigning the new state directly.
These interfaces also aid CONFIG_DEBUG_ATOMIC_SLEEP environments, keeping
track of who changed the state.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
a9c5bcfa43 scripts/gdb: disable pagination while printing from breakpoint handler
While reporting the (refreshed) list of modules on automatic updates we
may hit the page boundary of the output console and cause a stop if
pagination is enabled.  However, gdb does not accept user input while
running over the breakpoint handler.  So we get stuck, and the user is
forced to interrupt gdb.

Resolve this by disabling pagination during automatic symbol updates.  We
restore the user's configuration once done.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
158daf1673 scripts/gdb: define maintainer
I'm proposing myself for keeping an eye on these scripts and integrating
contributions.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
a77e15e8b4 scripts/gdb: convert CpuList to generator function
Yet another code simplification.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Jan Kiszka
fffb944c4e scripts/gdb: convert ModuleList to generator function
Analogously to the task list, convert the module list to a generator
function.  It noticeably simplifies the code.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:55 -08:00
Daniel Wagner
54e2289a34 scripts/gdb: use a generator instead of iterator for task list
The iterator does not return any task_struct from the thread_group list
because the first condition in the 'if not t or ...' will only be the
first time None.

Instead of keeping track of the state ourself in the next() function, we
fall back using Python's generator.

Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00
Daniel Thompson
2478a8a15c scripts/gdb: ignore byte-compiled python files
Using the gdb scripts leaves byte-compiled python files in the scripts/
directory.  These should be ignored by git.

[jan.kiszka@siemens.com: drop redundant mrproper rule as suggested by Michal]
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-17 14:34:54 -08:00