Commit 5d98e61d33 ("I2C/ACPI: Add i2c ACPI operation region support")
renamed the i2c-core module. This may cause regressions for
distributions, so put the ACPI code back into the core.
Reported-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Lan Tianyu <tianyu.lan@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
These new-lines add empty lines to trace output
Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
In cases where board has below memory DT node
memory{
device_type = "memory";
reg = <0x80000000 0x80000000>;
};
Check on the memory range in fdt.c will always fail because it is
comparing MAX_PHYS_ADDR with base + size, in fact it should compare
it with base + size - 1.
This issue was originally noticed on Qualcomm IFC6410 board.
Without this patch kernel shows up noticed unnecessary warnings
[ 0.000000] Machine model: Qualcomm APQ8064/IFC6410
[ 0.000000] Ignoring memory range 0xffffffff - 0x100000000
[ 0.000000] cma: Reserved 64 MiB at ab800000
as a result the size get reduced to 0x7fffffff which looks wrong.
This patch fixes the check involved in generating this warning and
as a result it also fixes the wrong size calculation.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
[grant.likely: adjust new size calculation also]
Signed-off-by: Grant Likely <grant.likely@linaro.org>
When we change cpuset.memory_spread_{page,slab}, cpuset will flip
PF_SPREAD_{PAGE,SLAB} bit of tsk->flags for each task in that cpuset.
This should be done using atomic bitops, but currently we don't,
which is broken.
Tetsuo reported a hard-to-reproduce kernel crash on RHEL6, which happened
when one thread tried to clear PF_USED_MATH while at the same time another
thread tried to flip PF_SPREAD_PAGE/PF_SPREAD_SLAB. They both operate on
the same task.
Here's the full report:
https://lkml.org/lkml/2014/9/19/230
To fix this, we make PF_SPREAD_PAGE and PF_SPREAD_SLAB atomic flags.
v4:
- updated mm/slab.c. (Fengguang Wu)
- updated Documentation.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Miao Xie <miaox@cn.fujitsu.com>
Cc: Kees Cook <keescook@chromium.org>
Fixes: 950592f7b9 ("cpusets: update tasks' page/slab spread flags in time")
Cc: <stable@vger.kernel.org> # 2.6.31+
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This will simplify code when we add new flags.
v3:
- Kees pointed out that no_new_privs should never be cleared, so we
shouldn't define task_clear_no_new_privs(). we define 3 macros instead
of a single one.
v2:
- updated scripts/tags.sh, suggested by Peter
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Miao Xie <miaox@cn.fujitsu.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Commit 1d4457f999 ("sched: move no_new_privs into new atomic flags")
defined PFA_NO_NEW_PRIVS as hexadecimal value, but it is confusing
because it is used as bit number. Redefine it as decimal bit number.
Note this changes the bit position of PFA_NOW_NEW_PRIVS from 1 to 0.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Kees Cook <keescook@chromium.org>
[ lizf: slightly modified subject and changelog ]
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
We need to add this module to the nomux table to be able to detect the
touchpad.
Cc: stablevger.kernel.org
Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pull drm fixes from Dave Airlie:
"Some final radeon and i915 fixes, black screens mostly"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/radeon/cik: use a separate counter for CP init timeout
drm/i915/hdmi: fix hdmi audio state readout
drm/i915: Don't leak command parser tables on suspend/resume
drm/radeon: add PX quirk for asus K53TK
drm/radeon: add a backlight quirk for Amilo Xi 2550
drm/radeon: add a module parameter for backlight control (v2)
drm/radeon: Update IH_RB_RPTR register after each processed interrupt
drm/radeon: Make IH ring overflow debugging output more useful
drm/radeon: Clear RB_OVERFLOW bit earlier
Fix code when the operation region callback is for an gpio, which
is not at index 0 and for partial pins in a GPIO definition.
For example:
Name (GMOD, ResourceTemplate ()
{
//3 Outputs that define the Power mode of the device
GpioIo (Exclusive, PullDown, , , , "\\_SB.GPI2") {10, 11, 12}
})
}
If opregion callback calls is for:
- Set pin 10, then address = 0 and bit length = 1
- Set pin 11, then address = 1 and bit length = 1
- Set for both pin 11 and pin 12, then address = 1, bit length = 2
This change requires updated ACPICA gpio operation handler code to
send the pin index and bit length.
Fixes: 473ed7be0d (gpio / ACPI: Add support for ACPI GPIO operation regions)
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+: 75ec6e55f1 ACPICA: Update to GPIO region handler interface.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
If we're executing the 32-bit efi_char16_printk() code path (i.e.
running on top of 32-bit firmware) we know that efi_early->text_output
will be a 32-bit value, even though ->text_output has type u64.
Unfortunately, we currently pass ->text_output directly to
efi_early->call() so for CONFIG_X86_32 the compiler will push a 64-bit
value onto the stack, causing the other parameters to be misaligned.
The way we handle this in the rest of the EFI boot stub is to pass
pointers as arguments to efi_early->call(), which automatically do the
right thing (pointers are 32-bit on CONFIG_X86_32, and we simply ignore
the upper 32-bits of the argument register if running in 64-bit mode
with 32-bit firmware).
This fixes a corruption bug when printing strings from the 32-bit EFI
boot stub.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=84241
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Changes to correct several GPIO issues:
1) The update_rule in a GPIO field definition is now ignored;
a read-modify-write operation is never performed for GPIO fields.
(Internally, this means that the field assembly/disassembly
code is completely bypassed for GPIO.)
2) The Address parameter passed to a GPIO region handler is
now the bit offset of the field from a previous Connection()
operator. Thus, it becomes a "Pin Number Index" into the
Connection() resource descriptor.
3) The bit_width parameter passed to a GPIO region handler is
now the exact bit width of the GPIO field. Thus, it can be
interpreted as "number of pins".
Overall, we can now say that the region handler interface
to GPIO handlers is a raw "bit/pin" addressed interface, not
a byte-addressed interface like the system_memory handler interface.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- fix a backlight regression resulting in dark screen
- add a PX quirk to avoid a hang with runtime pm
- fix an init issue on the CIK compute rings
- fix IH ring buffer overflows gracefully
* 'drm-fixes-3.17' of git://people.freedesktop.org/~agd5f/linux:
drm/radeon/cik: use a separate counter for CP init timeout
drm/radeon: add PX quirk for asus K53TK
drm/radeon: add a backlight quirk for Amilo Xi 2550
drm/radeon: add a module parameter for backlight control (v2)
drm/radeon: Update IH_RB_RPTR register after each processed interrupt
drm/radeon: Make IH ring overflow debugging output more useful
drm/radeon: Clear RB_OVERFLOW bit earlier
a couple of small fixes for 3.17 still.
* tag 'drm-intel-fixes-2014-09-24' of git://anongit.freedesktop.org/drm-intel:
drm/i915/hdmi: fix hdmi audio state readout
drm/i915: Don't leak command parser tables on suspend/resume
On some systems (Asus T100 in particular) there are strict ordering
dependencies between LPSS devices with respect to power management
that break if they suspend/resume asynchronously.
In theory it should be possible to follow those dependencies in the
async suspend/resume case too (the ACPI tables tell as that the
dependencies are there), but since we're missing infrastructure
for that at the moment, disable async suspend/resume for all of
the LPSS devices for the time being.
Link: http://marc.info/?l=linux-acpi&m=141158962321905&w=2
Fixes: 8ce62f85a8 (ACPI / platform / LPSS: Enable async suspend/resume of LPSS devices)
Signed-off-by: Li Aubrey <aubrey.li@linux.intel.com>
Signed-off-by: Fu Zhonghui <zhonghui.fu@linux.intel.com>
Cc: 3.16+ <stable@vger.kernel.org> # 3.16+
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Pull networking fixes from David Miller:
"Here is a quick pull request primarily meant to address the deconfig
fallout from changing SCSI_NETLINK from being used via 'select' to
being used via 'depends'.
I applied a set of 5 patches written by Michal Marek, and then I
carefully audited all of the remaining config files, basically:
1) I scanned every arch config file, and if it mentioned CONFIG_INET
or CONFIG_UNIX, I made sure it had CONFIG_NET=y
2) After that, I scanned every arch config file, and if it did not
have CONFIG_NET=y I made sure it did not reference any networking
config options.
Finally, we have some late breaking wireless fixes in here from John
Linville and co"
[ And there's a sparc bpf fix snuck in too ]
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
sparc: bpf_jit: fix loads from negative offsets
parisc: Update defconfigs which were missing CONFIG_NET.
powerpc: Update defconfigs which were missing CONFIG_NET.
s390: Update defconfigs which were missing CONFIG_NET.
mips: Update some more defconfigs which were missing CONFIG_NET.
sparc: Set CONFIG_NET=y in defconfigs
sh: Set CONFIG_NET=y in defconfigs
powerpc: Set CONFIG_NET=y in defconfigs
parisc: Set CONFIG_NET=y in defconfigs
mips: Set CONFIG_NET=y in defconfigs
brcmfmac: Fix off by one bug in brcmf_count_20mhz_channels()
ath9k: Fix NULL pointer dereference on early irq
net: rfkill: gpio: Fix clock status
NFC: st21nfca: Fix potential depmod dependency cycle
NFC: st21nfcb: Fix depmod dependency cycle
NFC: microread: Potential overflows in microread_target_discovered()
- fix BPF_LD|ABS|IND from negative offsets:
make sure to sign extend lower 32 bits in 64-bit register
before calling C helpers from JITed code, otherwise 'int k'
argument of bpf_internal_load_pointer_neg_helper() function
will be added as large unsigned integer, causing packet size
check to trigger and abort the program.
It's worth noting that JITed code for 'A = A op K' will affect
upper 32 bits differently depending whether K is simm13 or not.
Since small constants are sign extended, whereas large constants
are stored in temp register and zero extended.
That is ok and we don't have to pay a penalty of sign extension
for every sethi, since all classic BPF instructions have 32-bit
semantics and we only need to set correct upper bits when
transitioning from JITed code into C.
- though instructions 'A &= 0' and 'A *= 0' are odd, JIT compiler
should not optimize them out
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
John W. Linville says:
====================
pull request: wireless 2014-09-23
Please consider pulling this one last batch of fixes intended for the 3.17 stream!
For the NFC bits, Samuel says:
"Hopefully not too late for a handful of NFC fixes:
- 2 potential build failures for ST21NFCA and ST21NFCB, triggered by a
depmod dependenyc cycle.
- One potential buffer overflow in the microread driver."
On top of that...
Emil Goode provides a fix for a brcmfmac off-by-one regression which
was introduced in the 3.17 cycle.
Loic Poulain fixes a polarity mismatch for a variable assignment
inside of rfkill-gpio.
Wojciech Dubowik prevents a NULL pointer dereference in ath9k.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit df568d8e ("scsi: Use 'depends' with LIBFC instead of
'select'.") removed what happened to be the only instance of 'select
NET'. Defconfigs that were relying on the select now lack networking
support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit df568d8e ("scsi: Use 'depends' with LIBFC instead of
'select'.") removed what happened to be the only instance of 'select
NET'. Defconfigs that were relying on the select now lack networking
support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit df568d8e ("scsi: Use 'depends' with LIBFC instead of
'select'.") removed what happened to be the only instance of 'select
NET'. Defconfigs that were relying on the select now lack networking
support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit df568d8e ("scsi: Use 'depends' with LIBFC instead of
'select'.") removed what happened to be the only instance of 'select
NET'. Defconfigs that were relying on the select now lack networking
support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK dependent on NET
instead of selecting NET") removed what happened to be the only instance
of 'select NET'. Defconfigs that were relying on the select now lack
networking support.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK dependent on NET
instead of selecting NET") removed what happened to be the only instance
of 'select NET'. Defconfigs that were relying on the select now lack
networking support.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: linux-sh@vger.kernel.org
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK dependent on NET
instead of selecting NET") removed what happened to be the only instance
of 'select NET'. Defconfigs that were relying on the select now lack
networking support.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK dependent on NET
instead of selecting NET") removed what happened to be the only instance
of 'select NET'. Defconfigs that were relying on the select now lack
networking support.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: linux-parisc@vger.kernel.org
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 5d6be6a5 ("scsi_netlink : Make SCSI_NETLINK dependent on NET
instead of selecting NET") removed what happened to be the only instance
of 'select NET'. Defconfigs that were relying on the select now lack
networking support.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: linux-mips@linux-mips.org
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull one last block fix from Jens Axboe:
"We've had an issue with scsi-mq where probing takes forever. This was
bisected down to the percpu changes for blk_mq_queue_enter(), and the
fact we now suffer an RCU grace period when killing a queue. SCSI
creates and destroys tons of queues, so this let to 10s of seconds of
stalls at boot for some.
Tejun has a real fix for this, but it's too involved for 3.17. So
this is a temporary workaround to expedite the queue killing until we
can fold in the real fix for 3.18 when that merge window opens"
* 'for-linus' of git://git.kernel.dk/linux-block:
blk-mq, percpu_ref: implement a kludge for SCSI blk-mq stall during probe
Enumeration
- Revert "PCI: Don't scan random busses in pci_scan_bridge()" (Bjorn Helgaas)
- Revert "PCI: Make sure bus number resources stay within their parents bounds" (Bjorn Helgaas)
PCI device hotplug
- Fix pciehp pcie_wait_cmd() timeout (Yinghai Lu)
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Merge tag 'pci-v3.17-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
"Here are a few fixes that should be in v3.17.
- Reverting "Don't scan random busses" covers up a CardBus regression
having to do with allocating CardBus bus numbers.
- Reverting "Make sure bus numbers stay within parents bounds" covers
up an ACPI _CRS bug that makes us reconfigure a bridge, causing a
broken device behind it to stop responding.
- The pciehp timeout change fixes some code we added in v3.17.
Without the fix, we can send a new hotplug command too early,
before the timeout has expired.
I hope for better fixes for the reverts, but those will have to come
after v3.17"
* tag 'pci-v3.17-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: pciehp: Fix pcie_wait_cmd() timeout
Revert "PCI: Make sure bus number resources stay within their parents bounds"
Revert "PCI: Don't scan random busses in pci_scan_bridge()"
Pull crypto fixes from Herbert Xu:
"This fixes three issues:
- if ccp is loaded on a machine without ccp, it will incorrectly
activate causing all requests to fail. Fixed by preventing ccp
from loading if hardware isn't available.
- not all IRQs were enabled for the qat driver, leading to potential
stalls when it is used
- disabled buggy AVX CTR implementation in aesni"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: aesni - disable "by8" AVX CTR optimization
crypto: ccp - Check for CCP before registering crypto algs
crypto: qat - Enable all 32 IRQs
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Merge tag 'media/v3.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"For some last time fixes:
- a regression detected on Kernel 3.16 related to VBI Teletext
application breakage on drivers using videobuf2 (see
https://bugzilla.kernel.org/show_bug.cgi?id=84401). The bug was
noticed on saa7134 (migrated to VB2 on 3.16), but also affects
em28xx (migrated on 3.9 to VB2);
- two additional sanity checks at videobuf2;
- two fixups to restore proper VBI support at the em28xx driver;
- two Kernel oops fixups (at cx24123 and cx2341x drivers);
- a bug at adv7604 where an if was doing just the opposite as it
would be expected;
- some documentation fixups to match the behavior defined at the
Kernel"
* tag 'media/v3.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
[media] em28xx-v4l: get rid of field "users" in struct em28xx_v4l2"
[media] em28xx: fix VBI handling logic
[media] DocBook media: improve the poll() documentation
[media] DocBook media: fix the poll() 'no QBUF' documentation
[media] vb2: fix VBI/poll regression
[media] cx2341x: fix kernel oops
[media] cx24123: fix kernel oops due to missing parent pointer
[media] adv7604: fix inverted condition
[media] media/radio: fix radio-miropcm20.c build with io.h header file
[media] vb2: fix plane index sanity check in vb2_plane_cookie()
[media] DocBook media: update version number and V4L2 changes
[media] DocBook media: fix fieldname in struct v4l2_subdev_selection
[media] vb2: fix vb2 state check when start_streaming fails
[media] videobuf2-core.h: fix comment
[media] videobuf2-core: add comments before the WARN_ON
[media] videobuf2-dma-sg: fix for wrong GFP mask to sg_alloc_table_from_pages
particularly, but not only, fixing new "resync" code.
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Merge tag 'md/3.17-more-fixes' of git://git.neil.brown.name/md
Pull bugfixes for md/raid1 from Neil Brown:
"It is amazing how much easier it is to find bugs when you know one is
there. Two bug reports resulted in finding 7 bugs!
All are tagged for -stable. Those that can't cause (rare) data
corruption, cause lockups.
Particularly, but not only, fixing new "resync" code"
* tag 'md/3.17-more-fixes' of git://git.neil.brown.name/md:
md/raid1: fix_read_error should act on all non-faulty devices.
md/raid1: count resync requests in nr_pending.
md/raid1: update next_resync under resync_lock.
md/raid1: Don't use next_resync to determine how far resync has progressed
md/raid1: make sure resync waits for conflicting writes to complete.
md/raid1: clean up request counts properly in close_sync()
md/raid1: be more cautious where we read-balance during resync.
md/raid1: intialise start_next_window for READ case to avoid hang
blk-mq uses percpu_ref for its usage counter which tracks the number
of in-flight commands and used to synchronously drain the queue on
freeze. percpu_ref shutdown takes measureable wallclock time as it
involves a sched RCU grace period. This means that draining a blk-mq
takes measureable wallclock time. One would think that this shouldn't
matter as queue shutdown should be a rare event which takes place
asynchronously w.r.t. userland.
Unfortunately, SCSI probing involves synchronously setting up and then
tearing down a lot of request_queues back-to-back for non-existent
LUNs. This means that SCSI probing may take more than ten seconds
when scsi-mq is used.
This will be properly fixed by implementing a mechanism to keep
q->mq_usage_counter in atomic mode till genhd registration; however,
that involves rather big updates to percpu_ref which is difficult to
apply late in the devel cycle (v3.17-rc6 at the moment). As a
stop-gap measure till the proper fix can be implemented in the next
cycle, this patch introduces __percpu_ref_kill_expedited() and makes
blk_mq_freeze_queue() use it. This is heavy-handed but should work
for testing the experimental SCSI blk-mq implementation.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Christoph Hellwig <hch@infradead.org>
Link: http://lkml.kernel.org/g/20140919113815.GA10791@lst.de
Fixes: add703fda9 ("blk-mq: use percpu_ref for mq usage count")
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Tested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
The "by8" implementation introduced in commit 22cddcc7df ("crypto: aes
- AES CTR x86_64 "by8" AVX optimization") is failing crypto tests as it
handles counter block overflows differently. It only accounts the right
most 32 bit as a counter -- not the whole block as all other
implementations do. This makes it fail the cryptomgr test #4 that
specifically tests this corner case.
As we're quite late in the release cycle, just disable the "by8" variant
for now.
Reported-by: Romain Francoise <romain@orebokech.com>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Chandramouli Narayanan <mouli@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The following bug can be triggered by hot adding and removing a large number of
xen domain0's vcpus repeatedly:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000004 IP: [..] find_busiest_group
PGD 5a9d5067 PUD 13067 PMD 0
Oops: 0000 [#3] SMP
[...]
Call Trace:
load_balance
? _raw_spin_unlock_irqrestore
idle_balance
__schedule
schedule
schedule_timeout
? lock_timer_base
schedule_timeout_uninterruptible
msleep
lock_device_hotplug_sysfs
online_store
dev_attr_store
sysfs_write_file
vfs_write
SyS_write
system_call_fastpath
Last level cache shared mask is built during CPU up and the
build_sched_domain() routine takes advantage of it to setup
the sched domain CPU topology.
However, llc_shared_mask is not released during CPU disable,
which leads to an invalid sched domainCPU topology.
This patch fix it by releasing the llc_shared_mask correctly
during CPU disable.
Yasuaki also reported that this can happen on real hardware:
https://lkml.org/lkml/2014/7/22/1018
His case is here:
==
Here is an example on my system.
My system has 4 sockets and each socket has 15 cores and HT is
enabled. In this case, each core of sockes is numbered as
follows:
| CPU#
Socket#0 | 0-14 , 60-74
Socket#1 | 15-29, 75-89
Socket#2 | 30-44, 90-104
Socket#3 | 45-59, 105-119
Then llc_shared_mask of CPU#30 has 0x3fff80000001fffc0000000.
It means that last level cache of Socket#2 is shared with
CPU#30-44 and 90-104.
When hot-removing socket#2 and #3, each core of sockets is
numbered as follows:
| CPU#
Socket#0 | 0-14 , 60-74
Socket#1 | 15-29, 75-89
But llc_shared_mask is not cleared. So llc_shared_mask of CPU#30
remains having 0x3fff80000001fffc0000000.
After that, when hot-adding socket#2 and #3, each core of
sockets is numbered as follows:
| CPU#
Socket#0 | 0-14 , 60-74
Socket#1 | 15-29, 75-89
Socket#2 | 30-59
Socket#3 | 90-119
Then llc_shared_mask of CPU#30 becomes
0x3fff8000fffffffc0000000. It means that last level cache of
Socket#2 is shared with CPU#30-59 and 90-104. So the mask has
the wrong value.
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Tested-by: Linn Crosetto <linn@hp.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Toshi Kani <toshi.kani@hp.com>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: <stable@vger.kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1411547885-48165-1-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
A number of people are reporting seeing the "setup_efi_pci() failed!"
error message in what used to be a quiet boot,
https://bugzilla.kernel.org/show_bug.cgi?id=81891
The message isn't all that helpful because setup_efi_pci() can return a
non-success error code for a variety of reasons, not all of them fatal.
Let's drop the return code from setup_efi_pci*() altogether, since
there's no way to process it in any meaningful way outside of the inner
__setup_efi_pci*() functions.
Reported-by: Darren Hart <dvhart@linux.intel.com>
Reported-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: Ulf Winkelvos <ulf@winkelvos.de>
Cc: Andre Müller <andre.muller@web.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Fix double unlock of fe card mutex introduced by patch 8f70e515a8
"ASoC: soc-pcm: fix dpcm_path_get error handling"
The first unlock is at line 106, and the unlock is at line 149. we
should remove the first unlock.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This fixes a bug when using the SOC_DOUBLE_R_RANGE_TLV macro in
the invert mode. In the non-invert case, e.g.
SOC_DOUBLE_R_RANGE_TLV("<name>", <reg_l>, <reg_r>,
0, 40, 255, 0, <tlv>)
the range sent to the hardware is 40..255, but in the invert case:
SOC_DOUBLE_R_RANGE_TLV("<name>", <reg_l>, <reg_r>,
0, 40, 255, 1, <tlv>)
the range 215..0 was being sent to the hardware. This commit
corrects this to 255..40 so it is consistent with the non-invert
case.
Signed-off-by: Howard Mitchell <hm@hmbedded.co.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
There is possibility with misconfigured pins that interrupt occurs instantly
after setting irq_set_chained_handler() in gpiochip_set_chained_irqchip().
Now if handler gets called before irq_set_handler_data() the handler gets
NULL handler data.
Fix this by moving irq_set_handler_data() call before
irq_set_chained_handler() in gpiochip_set_chained_irqchip().
Cc: Stable <stable@vger.kernel.org> # 3.15+
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
GPIO direction flags are not getting set because
an 'if' statement is the wrong way around.
Cc: Stable <stable@vger.kernel.org> # 3.15+
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
If the ccp is built as a built-in module, then ccp-crypto (whether
built as a module or a built-in module) will be able to load and
it will register its crypto algorithms. If the system does not have
a CCP this will result in -ENODEV being returned whenever a command
is attempted to be queued by the registered crypto algorithms.
Add an API, ccp_present(), that checks for the presence of a CCP
on the system. The ccp-crypto module can use this to determine if it
should register it's crypto alogorithms.
Cc: stable@vger.kernel.org
Reported-by: Scot Doyle <lkml14@scotdoyle.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Tested-by: Scot Doyle <lkml14@scotdoyle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
since commit 31964ffebb ("tty: serial: msm: Remove direct access to GSBI")'
serial hangs if earlyprintk are enabled.
This hang is noticed only when the GSBI driver is probed and all the
earlyprintks before gsbi probe are seen on the console.
The reason why it hangs is because GSBI driver disables hclk in its
probe function without realizing that the serial IP might be in use by
a bootconsole. As gsbi driver disables the clock in probe the
bootconsole locks up.
Turning off hclk's could be dangerous if there are system components
like earlyprintk using the hclk.
This patch fixes the issue by delegating the clock management to
probe and remove functions in gsbi rather than disabling the clock in probe.
More detailed problem description can be found here:
http://www.spinics.net/lists/linux-arm-msm/msg10589.html
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
- Fixes for the new memory region re-registration support
- iSER initiator error path fixes
- Grab bag of small fixes for the qib and ocrdma hardware drivers
- Larger set of fixes for mlx4, especially in RoCE mode
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull infiniband/rdma fixes from Roland Dreier:
"Last late set of InfiniBand/RDMA fixes for 3.17:
- fixes for the new memory region re-registration support
- iSER initiator error path fixes
- grab bag of small fixes for the qib and ocrdma hardware drivers
- larger set of fixes for mlx4, especially in RoCE mode"
* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (26 commits)
IB/mlx4: Fix VF mac handling in RoCE
IB/mlx4: Do not allow APM under RoCE
IB/mlx4: Don't update QP1 in native mode
IB/mlx4: Avoid accessing netdevice when building RoCE qp1 header
mlx4: Fix mlx4 reg/unreg mac to work properly with 0-mac addresses
IB/core: When marshaling uverbs path, clear unused fields
IB/mlx4: Avoid executing gid task when device is being removed
IB/mlx4: Fix lockdep splat for the iboe lock
IB/mlx4: Get upper dev addresses as RoCE GIDs when port comes up
IB/mlx4: Reorder steps in RoCE GID table initialization
IB/mlx4: Don't duplicate the default RoCE GID
IB/mlx4: Avoid null pointer dereference in mlx4_ib_scan_netdevs()
IB/iser: Bump version to 1.4.1
IB/iser: Allow bind only when connection state is UP
IB/iser: Fix RX/TX CQ resource leak on error flow
RDMA/ocrdma: Use right macro in query AH
RDMA/ocrdma: Resolve L2 address when creating user AH
mlx4: Correct error flows in rereg_mr
IB/qib: Correct reference counting in debugfs qp_stats
IPoIB: Remove unnecessary port query
...
One fix is about a buggy compuation in PCM API function Clemens
spotted out, but the impact must be really small as no one
really uses it in user-space side. The rest are a trivial fix
for a HD-audio model and a USB-audio device-specific regression
fix, so all look fairly safe to apply.
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Merge tag 'sound-3.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"One fix is about a buggy computation in PCM API function Clemens
spotted out, but the impact must be really small as no one really uses
it in user-space side.
The rest are a trivial fix for a HD-audio model and a USB-audio
device-specific regression fix, so all look fairly safe to apply"
* tag 'sound-3.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: snd-usb-caiaq: Fix LED commands for Kore controller
ALSA: pcm: fix fifo_size frame calculation
ALSA: hda - Add fixup model name lookup for Lemote A1205
Pull final block fixes from Jens Axboe:
"This week and last we've been fixing some corner cases related to
blk-mq, mostly. I ended up pulling most of that out of for-linus
yesterday, which is why the branch looks fresh. The rest were
postponed for 3.18.
This pull request contains:
- Fix from Christoph, avoiding a stack overflow when FUA insertion
would recursive infinitely.
- Fix from David Hildenbrand on races between the timeout handler and
uninitialized requests. Fixes a real issue that virtio_blk has run
into.
- A few fixes from me:
- Ensure that request deadline/timeout is ordered before the
request is marked as started.
- A potential oops on out-of-memory, when we scale the queue
depth of the device and retry.
- A hang fix on requeue from SCSI, where the hardware queue
would be stopped when we attempt to re-run it (and hence
nothing would happen, stalling progress).
- A fix for commit 2da78092, where the cleanup path was moved
to RCU, but a debug might_sleep() was inadvertently left in
the code. This causes warnings for people"
* 'for-linus' of git://git.kernel.dk/linux-block:
genhd: fix leftover might_sleep() in blk_free_devt()
blk-mq: use blk_mq_start_hw_queues() when running requeue work
blk-mq: fix potential oops on out-of-memory in __blk_mq_alloc_rq_maps()
blk-mq: avoid infinite recursion with the FUA flag
blk-mq: Avoid race condition with uninitialized requests
blk-mq: request deadline must be visible before marking rq as started
Pull parisc fixes from Helge Deller:
"We avoid using -mfast-indirect-calls for 64bit kernel builds to
prevent building an unbootable kernel due to latest gcc changes.
In the pdc_stable/firmware-access driver we fix a few possible stack
overflows and we now call secure_computing_strict() instead of
secure_computing() which fixes upcoming SECCOMP patches in the
for-next trees"
* 'parisc-3.17-7' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Only use -mfast-indirect-calls option for 32-bit kernel builds
parisc: pdc_stable.c: Avoid potential stack overflows
parisc: pdc_stable.c: Cleaning up unnecessary use of memset in conjunction with strncpy
parisc: ptrace: use secure_computing_strict()
This reverts commit f23cf8bd5c ("efi/x86: efistub: Move shared
dependencies to <asm/efi.h>") as well as the x86 parts of commit
f4f75ad574 ("efi: efistub: Convert into static library").
The road leading to these two reverts is long and winding.
The above two commits were merged during the v3.17 merge window and
turned the common EFI boot stub code into a static library. This
necessitated making some symbols global in the x86 boot stub which
introduced new entries into the early boot GOT.
The problem was that we weren't fixing up the newly created GOT entries
before invoking the EFI boot stub, which sometimes resulted in hangs or
resets. This failure was reported by Maarten on his Macbook pro.
The proposed fix was commit 9cb0e39423 ("x86/efi: Fixup GOT in all
boot code paths"). However, that caused issues for Linus when booting
his Sony Vaio Pro 11. It was subsequently reverted in commit
f3670394c2.
So that leaves us back with Maarten's Macbook pro not booting.
At this stage in the release cycle the least risky option is to revert
the x86 EFI boot stub to the pre-merge window code structure where we
explicitly #include efi-stub-helper.c instead of linking with the static
library. The arm64 code remains unaffected.
We can take another swing at the x86 parts for v3.18.
Conflicts:
arch/x86/include/asm/efi.h
Tested-by: Josh Boyer <jwboyer@fedoraproject.org>
Tested-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Tested-by: Leif Lindholm <leif.lindholm@linaro.org> [arm64]
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
In spite of what the GCC manual says, the -mfast-indirect-calls has
never been supported in the 64-bit parisc compiler. Indirect calls have
always been done using function descriptors irrespective of the
-mfast-indirect-calls option.
Recently, it was noticed that a function descriptor was always requested
when the -mfast-indirect-calls option was specified. This caused
problems when the option was used in application code and doesn't make
any sense because the whole point of the option is to avoid using a
function descriptor for indirect calls.
Fixing this broke 64-bit kernel builds.
I will fix GCC but for now we need the attached change. This results in
the same kernel code as before.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org # v3.0+
Signed-off-by: Helge Deller <deller@gmx.de>
"select NET" in drivers/scsi/Kconfig
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Merge tag 'please-pull-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
Pull ia64 defconfig update from Tony Luck:
"Need to rebuild defconfig files to cope with removal of "select NET"
in drivers/scsi/Kconfig"
* tag 'please-pull-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
[IA64] refresh arch/ia64/configs/* using "make savedefconfig"
Add support for two more processors to fam15h_power driver.
Also fix a bug in the same driver to only report the power level
on chips which actually support reporting it.
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fixes from Guenter Roeck:
- Fix a resource leak in tmp103 driver
- Add support for two more processors to fam15h_power driver
- Also fix a bug in the same driver to only report the power level on
chips which actually support reporting it
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (tmp103) Fix resource leak bug in tmp103 temperature sensor driver
hwmon: (fam15h_power) Add support for two more processors
hwmon: (fam15h_power) Make actual power reporting conditional
