Commit Graph

737480 Commits

Author SHA1 Message Date
Andy Shevchenko
c14b65feac serial: 8250_dw: Revert "Improve clock rate setting"
The commit

  de9e33bdfa ("serial: 8250_dw: Improve clock rate setting")

obviously tries to cure symptoms, and not a root cause.

The root cause is the non-flexible rate calculation inside the
corresponding clock driver. What we need is to provide maximum UART
divisor value to the clock driver to allow it do the job transparently
to the caller.

Since from the initial commit message I have got no clue which clock
driver actually needs to be amended, I leave this exercise to the people
who know better the case.

Moreover, it seems [1] the fix introduced a regression. And possible
even one more [2].

Taking above, revert the commit de9e33bdfa for now.

[1]: https://www.spinics.net/lists/linux-serial/msg28872.html
[2]: https://github.com/Dunedan/mbp-2016-linux/issues/29#issuecomment-357583782

Fixes: de9e33bdfa ("serial: 8250_dw: Improve clock rate setting")
Cc: stable <stable@vger.kernel.org> # 4.15
Cc: Ed Blake <ed.blake@sondrel.com>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 14:13:40 +01:00
Andy Shevchenko
a0075d168a MAINTAINERS: Add myself as designated reviewer for 8250_dw
It happened several times that some odd fixes either introduced
regressions, or did hack the code instead of addressing a root cause.

Nominate myself to be a designated reviewer for 8250_dw driver.

Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 14:13:40 +01:00
weiyongjun (A)
0ddcff49b6 mac80211_hwsim: fix possible memory leak in hwsim_new_radio_nl()
'hwname' is malloced in hwsim_new_radio_nl() and should be freed
before leaving from the error handling cases, otherwise it will cause
memory leak.

Fixes: ff4dd73dd2 ("mac80211_hwsim: check HWSIM_ATTR_RADIO_NAME length")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-01-22 14:03:29 +01:00
Christopher Díaz Riveros
9cb05f93d6 debugfs_sta: Remove unneeded semicolons
Trivial fix removes unneeded semicolons after switch blocks.

Signed-off-by: Christopher Díaz Riveros <chrisadr@gentoo.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2018-01-22 14:03:28 +01:00
Ladislav Michl
d3452f1d88 pinctrl: Forward declare struct device
pinctrl/devinfo.h is using forward declaration from pinctrl/consumer.h
for configurations with CONFIG_PINCTRL defined, however nothing declares
it in the opposite case. Fix this by adding a forward declaration.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-01-22 13:31:19 +01:00
Ladislav Michl
2efb8a8f11 ASoC: sam9x5_wm8731: Drop 'ASoC' prefix from error messages
dev_err already provides messages with prefix, so drop 'ASoC'
prefix.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-22 12:23:55 +00:00
Ladislav Michl
edefc8f387 ASoC: sam9g20_wm8731: use dev_*() logging functions
Use dev_*() logging functions instead of plain printk and as
messages are now properly prefixed drop 'ASoC' prefix as well.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-22 12:23:51 +00:00
Ryan Lee
180cad3c58 ASoC: max98373 Changed SPDX header in C++ comments style
Signed-off-by: Ryan Lee <ryans.lee@maximintegrated.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-22 12:23:45 +00:00
Chris Wilson
073cd78166 drm/i915: Protect WC stash allocation against direct reclaim
As we attempt to allocate pages for use in a new WC stash, direct
reclaim may run underneath us and fill up the WC stash. We have to be
careful then not to overflow the pvec.

Fixes: 66df1014ef ("drm/i915: Keep a small stash of preallocated WC pages")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103109
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180121173143.17090-1-chris@chris-wilson.co.uk
2018-01-22 12:22:04 +00:00
Matthias Kaehlcke
35b84bf061 ASoC: dmic: Fix check of return value from read of 'num-channels'
Commit 7fb59e940f ("ASoC: codecs: dmic: Make number of channels
 configurable") introduces an optional property to the device tree
to specify the number of DMIC channels. dmic_codec_probe() uses
of_property_read_u32() to read the DT value, and expects a return
value of -ENOENT when the property does not exist. This expectation
is incorrect, the actual value returned in this case is -EINVAL (see
of_find_property_value_of_size(), which is called under the hood).
Check for -EINVAL instead.

Fixes: 7fb59e940f ("ASoC: codecs: dmic: Make number of channels configurable")
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-22 12:20:46 +00:00
Ryder Lee
dc2a17f4f0 ASoC: mediatek: fix double free in mt2701_afe_pcm_dev_probe()
The commit dfa3cbb8(ASoC: mediatek: modify MT2701 AFE driver to adapt mfd device)
leads to the following static checker warning:

	sound/soc/mediatek/mt2701/mt2701-afe-pcm.c:1535 mt2701_afe_pcm_dev_probe()
	error: double free of 'component'

This patch fixes that and adds a helper mt2701_afe_add_component() to setup
component.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-01-22 12:18:36 +00:00
Hans de Goede
8c6b8eda72 Bluetooth: hci_bcm: For serdev case close serdev on failure to set power
Commit 8bfa7e1e03 ("Bluetooth: hci_bcm: Handle errors properly")
introduced error checking for the bcm_gpio_set_power() call in bcm_open()
but the error-path it introduces unsets dev->hu, which is correct for
platform_device instantiated bcm_dev-s but not for serdev instantiated
devs. For serdev instantiated devs serdev_device_close() should be called
instead (and dev->hu should be left set).

Cc: Lukas Wunner <lukas@wunner.de>
Fixes: 8bfa7e1e03 ("Bluetooth: hci_bcm: Handle errors properly")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2018-01-22 13:01:42 +01:00
Arnd Bergmann
0ca14cdea7 ARM: omap: hwmod: fix section mismatch warnings
Older compilers choose not to inline _setup_clkctrl_provider(),
leading to a harmless warning:

WARNING: vmlinux.o(.text+0x27b34): Section mismatch in reference from the function _setup_clkctrl_provider() to the function .init.text:memblock_virt_alloc_try_nid()
The function _setup_clkctrl_provider() references
the function __init memblock_virt_alloc_try_nid().
This is often because _setup_clkctrl_provider lacks a __init
annotation or the annotation of memblock_virt_alloc_try_nid is wrong.

This annotates it as __init as well, which lets the linker
see that it is actually correct.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-01-22 12:39:36 +01:00
Arnd Bergmann
6ab1e867ac Merge tag 'omap-for-v4.16/dt-clk-dts-signed' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/dt
Pull "Few omap interconnect dts fixes for v4.16 merge window" from
Tony Lindgren:

Now that we have the dts clocks for the clkctrl clock and the
interconnect binding, we need to update the existing ti-sysc
users according to the binding to make it usable for drivers.

Apologies for not being able to send this earlier but it took
me few revisions to get the smartreflex changes right and
tested with yet to be posted patches to make smartreflex probe
with dts and I wanted to have it sit in next for a while to make
sure we're not introducing regressions for legacy platform data
based booting.

Note that this is based on a merge with commit 20a2742e57
("dt-bindings: ti-sysc: Update binding for timers and capabilities")
to avoid a merge conflict with the binding changes.

* tag 'omap-for-v4.16/dt-clk-dts-signed' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: Update ti-sysc data for existing users
  ARM: dts: Fix smartreflex compatible for omap3 shared mpu-iva instance
  dt-bindings: ti-sysc: Update binding for timers and capabilities
2018-01-22 12:36:57 +01:00
Arnd Bergmann
3343647813 ARM: pxa/tosa-bt: add MODULE_LICENSE tag
Without this tag, we get a build warning:

WARNING: modpost: missing MODULE_LICENSE() in arch/arm/mach-pxa/tosa-bt.o

For completeness, I'm also adding author and description fields.

Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2018-01-22 12:36:03 +01:00
Kamal Heib
adb77ab0a1 staging: greybus: audio_codec.h Fix alignment should match open parenthesis
Fix "Alignment should match open parenthesis" checkpatch.pl errors.

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:49:24 +01:00
Kamal Heib
b822e33af0 staging: greybus: audio_codec.h: Prefer kernel type 'u32' over 'uint32_t'
Fix the following errors found by checkpatch.pl:
CHECK: Prefer kernel type 'u32' over 'uint32_t'

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:49:24 +01:00
Kamal Heib
6236015fd2 staging: greybus: audio_codec.c: Prefer kernel type 'u32' over 'uint32_t'
Fix the following errors found by checkpatch.pl:
CHECK: Prefer kernel type 'u32' over 'uint32_t'

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:49:24 +01:00
Kamal Heib
6a4dd600eb staging: greybus: audio_codec.c: Logical continuations should be on the previous line
Fix the following error found by checkpatch.pl:
CHECK: Logical continuations should be on the previous line

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:49:24 +01:00
Kamal Heib
0c3ba27bec staging: greybus: audio_codec.c: Space required around ':'
Space is required when using the question mark operator around ':'

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:49:23 +01:00
Kamal Heib
15f24ca42b staging: greybus: audio_codec.c: Cleanup blank lines
Remove the blank lines.

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:49:23 +01:00
Kamal Heib
c688bd9adc staging: greybus: audio_codec.c: Fix alignment should match open parenthesis
Cleanup "Alignment should match open parenthesis" checkpatch.pl errors.

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:48:06 +01:00
Kamal Heib
ea0af4b6d6 staging: greybus: authentication.c: Fix alignment should match open parenthesis
Fix the following error found by checkpatch.pl:
CHECK: Alignment should match open parenthesis
+static int cap_ioctl(struct gb_cap *cap, unsigned int cmd,
+			 void __user *buf)

Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:48:06 +01:00
Colin Ian King
783778e38e staging: rtl8192e: remove two redundant assignments
Clang detected two redundant assignments that can be safely removed.
The first is the removal of the duplicated assignment to pointer 'hdr',
this has already been initialized with the same value.  The second is
the removal of the redundant initialization of variable 'timeout', this
assigned value is never read and the variable is reassigned a new value
a little later.

Remove both redundant assignments, cleans up clang warnings:
drivers/staging/rtl8192e/rtllib_rx.c:1305:27: warning: Value stored to
'hdr' during its initialization is never read
drivers/staging/rtl8192e/rtllib_softmac.c:1971:6: warning: Value stored
to 'timeout' during its initialization is never read

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:48:06 +01:00
Colin Ian King
6065490a1f staging: rtl8712: remove redundant initialization to 'rfPath'
The value stored to rfPath during initialization is never read, the
following switch statement re-assigns it a new value on all the
case and default paths. Hence the initialization is redundant and
can be removed.

Cleans up clang warning:
drivers/staging/rtl8712/rtl871x_mp.c:544:5: warning: Value stored to
'rfPath' during its initialization is never read

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:48:05 +01:00
Bogdan Purcareata
203e2de32b staging: fsl-mc: Add SPDX license identifiers
The fsl-mc bus and dpio driver files use a combination of GPL-2.0 and
GPL-2.0+ OR BSD-3-Clause licenses. Add SPDX tags and delete the full
license text, keeping the existing license for each file. Add GPL-2.0
for Kconfig / Makefile, where not present.

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@nxp.com>
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:45:21 +01:00
Sidong Yang
4d7ce7c053 staging: most: replace function name to __func__
Fix checkpatch.pl warning message about logging code. Previous code
contains hard coded function name. Fix this code by using __func__
macro.

Signed-off-by: Sidong Yang <realwakka@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:44:08 +01:00
Dan Carpenter
134aecbc25 staging: lustre: libcfs: Prevent harmless read underflow
Because this is a post-op instead of a pre-op, then it means we check
if knl_buffer[-1] is a space.  It doesn't really hurt anything, but
it causes a static checker warning so let's fix it.

Fixes: d7e09d0397 ("staging: add Lustre file system client support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:40:49 +01:00
Sumit Pundir
a81200b5ac staging: lustre: lnet: remove null check before kfree
Since kfree(NULL) is safe there is no need to place a check before it.
Issue reported by checkpatch.pl

Signed-off-by: Sumit Pundir <pundirsumit11@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:40:49 +01:00
Sumit Pundir
142ad642cd staging: lustre: lnet: prefer kcalloc over kzalloc with multiply
Use kcalloc for allocating an array instead of kzalloc with
multiply. kcalloc is the preferred API. Issue reported by
checkpatch.pl

Signed-off-by: Sumit Pundir <pundirsumit11@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:40:49 +01:00
Fabian Huegel
99c7d99f1a staging: lustre: Align struct member identifiers
This patch properly left aligns all member identifiers in every
struct defined in obd_class.h for better readability.

Signed-off-by: Fabian Huegel <fabian_huegel@web.de>
Signed-off-by: Christoph Volkert <linux@christoph-volkert.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:40:49 +01:00
Fabian Huegel
2416fb7ba9 staging: lustre: Fix comment style
Most multi-line comments started on the first line, but the preferred
linux kernel style is to start multi-line comments on the second line.
Some comments became less readable after the change, so we changed them
to single-line comments.

Signed-off-by: Fabian Huegel <fabian_huegel@web.de>
Signed-off-by: Christoph Volkert <linux@christoph-volkert.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-22 11:40:49 +01:00
Michal Simek
7b6ce52be3 microblaze: Setup proper dependency for optimized lib functions
Optimized library functions are implemented only for little endian.
Setup this dependency via Kconfig.

commit 206d3642d8 ("arch/microblaze: add choice for endianness and
update Makefile") added an option to setup endianess via Kconfig.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2018-01-22 11:24:14 +01:00
Petr Mladek
bb4f552a59 Merge branch 'for-4.16-console-waiter-logic' into for-4.16 2018-01-22 10:40:59 +01:00
Petr Mladek
51ccbb0ae8 Merge branch 'for-4.16-print-symbol' into for-4.16 2018-01-22 10:40:50 +01:00
Petr Mladek
3ccdc5190f Merge branch 'for-4.16-deprecate-printk-pf' into for-4.16 2018-01-22 10:40:32 +01:00
Sergey Senozhatsky
6fd78a1a99 printk: drop redundant devkmsg_log_str memsets
We copy in null terminated strings "on" and "off", no
need to zero out devkmsg_log_str in control_devkmsg().

Link: http://lkml.kernel.org/r/20180119043901.1728-1-sergey.senozhatsky@gmail.com
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Petr Mladek <pmladek@suse.com>
2018-01-22 10:33:04 +01:00
Geert Uytterhoeven
470b73a384 pinctrl: sunxi: Use of_clk_get_parent_count() instead of open coding
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-01-22 09:55:05 +01:00
Alexandre Torgue
f90160fc95 pinctrl: stm32: add STM32F769 MCU support
This patch which adds STM32F769 pinctrl and GPIO support, relies on the
generic STM32 pinctrl driver.

Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Acked-by: Patrice CHOTARD <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-01-22 09:28:08 +01:00
David Lechner
f9de65fc61 mmc: davinci: suppress error message on EPROBE_DEFER
This suppresses printing an error message during probe of the TI DaVinci
MMC driver when the error is EPROBE_DEFER.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-01-22 08:21:56 +01:00
David Lechner
6478f4e12b mmc: davinci: dont' use module_platform_driver_probe()
This changes module_platform_driver_probe() to module_platform_driver()
in the TI DaVinci MMC driver.

On device tree systems, we can get a -EPROBE_DEFER when using a pinmux
for the CD GPIO, which results in the driver never loading because
module_platform_driver_probe() prevents it from being re-probed.

So, we replace module_platform_driver_probe() with
module_platform_driver() and removed the __init attributes accordingly.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-01-22 08:21:39 +01:00
Arnd Bergmann
4a09d0b86b mmc: tmio: hide unused tmio_mmc_clk_disable/tmio_mmc_clk_enable functions
When CONFIG_PM is disabled, we get a warning about the clock handling
being unused:

drivers/mmc/host/tmio_mmc_core.c:937:13: error: 'tmio_mmc_clk_disable' defined but not used [-Werror=unused-function]
 static void tmio_mmc_clk_disable(struct tmio_mmc_host *host)
             ^~~~~~~~~~~~~~~~~~~~
drivers/mmc/host/tmio_mmc_core.c:929:12: error: 'tmio_mmc_clk_enable' defined but not used [-Werror=unused-function]
 static int tmio_mmc_clk_enable(struct tmio_mmc_host *host)
            ^~~~~~~~~~~~~~~~~~~

As the clock handling is now done elsewhere, this is only used when
power management is enabled. We could make the functions as __maybe_unused,
but since there is already an #ifdef section, it seems easier to move
the helpers closer to their callers.

Fixes: b21fc29438 ("mmc: tmio: move clk_enable/disable out of tmio_mmc_host_probe()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-01-22 08:20:36 +01:00
Kirill A. Shutemov
0d665e7b10 mm, page_vma_mapped: Drop faulty pointer arithmetics in check_pte()
Tetsuo reported random crashes under memory pressure on 32-bit x86
system and tracked down to change that introduced
page_vma_mapped_walk().

The root cause of the issue is the faulty pointer math in check_pte().
As ->pte may point to an arbitrary page we have to check that they are
belong to the section before doing math. Otherwise it may lead to weird
results.

It wasn't noticed until now as mem_map[] is virtually contiguous on
flatmem or vmemmap sparsemem. Pointer arithmetic just works against all
'struct page' pointers. But with classic sparsemem, it doesn't because
each section memap is allocated separately and so consecutive pfns
crossing two sections might have struct pages at completely unrelated
addresses.

Let's restructure code a bit and replace pointer arithmetic with
operations on pfns.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-and-tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Fixes: ace71a19ce ("mm: introduce page_vma_mapped_walk()")
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-01-21 17:44:47 -08:00
Nicholas Piggin
35adacd6fc powerpc/pseries, ps3: panic flush kernel messages before halting system
Platforms with a panic handler that halts the system can have problems
getting kernel messages out, because the panic notifiers are called
before kernel/panic.c does its flushing of printk buffers an console
etc.

This was attempted to be solved with commit a3b2cb30f2 ("powerpc: Do
not call ppc_md.panic in fadump panic notifier"), but that wasn't the
right approach and caused other problems, and was reverted by commit
ab9dbf771f.

Instead, the powernv shutdown paths have already had a similar
problem, fixed by taking the message flushing sequence from
kernel/panic.c. That's a little bit ugly, but while we have the code
duplicated, it will work for this case as well. So have ppc panic
handlers do the same flushing before they terminate.

Without this patch, a qemu pseries_le_defconfig guest stops silently
when issued the nmi command when xmon is off and no crash dumpers
enabled. Afterwards, an oops is printed by each CPU as expected.

Fixes: ab9dbf771f ("Revert "powerpc: Do not call ppc_md.panic in fadump panic notifier"")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-01-22 11:44:24 +11:00
David S. Miller
ebdd7b491b Merge branch 'mlxsw-Add-support-for-mirror-action-with-flower'
Jiri Pirko says:

====================
mlxsw: Add support for mirror action with flower

Arkadi says:

Add support for mirror action with flower classifier. The first 3 patches
introduce a generic per-block resource infra. The last 4 patches add
support for flow based span.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-21 18:21:31 -05:00
Arkadi Sharshevsky
d0d13c1858 mlxsw: spectrum_acl: Add support for mirror action
Add support for mirror action. Only one mirror action can be set per rule.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-21 18:21:30 -05:00
Arkadi Sharshevsky
7928756cd0 mlxsw: spectrum: Extend mlxsw_afa_ops for counter index and implement for Spectrum
Introduce extension of mlxsw_afa_ops in order to add/del mirroring and
implement the ops for Spectrum.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-21 18:21:30 -05:00
Arkadi Sharshevsky
5c8d39c99a mlxsw: spectrum: Extend and export SPAN API
Extend SPAN API for ACL case. In case of ACL triggering the MPAR register
shouldn't be configured. This patch also export those helpers for
ACL usage.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-21 18:21:30 -05:00
Arkadi Sharshevsky
db0553b261 mlxsw: spectrum_acl: Add support for mirroring action
The patch extends the trap action for mirroring.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-21 18:21:30 -05:00
Jiri Pirko
c18c1e186b mlxsw: core: Make counter index allocated inside the action append
So far, the caller of mlxsw_afa_block_append_counter needed to allocate
counter index by hand. Benefit from the previously introduced resource
infra and counter_index_get/put callbacks, and allocate the counter
index in place where it is needed, inside the action append function.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-01-21 18:21:30 -05:00