tree c65c987a35972b0fe2b9b3213e2c7cf4568fd2d8
parent 6ba82ce833a7286fb60a8e7c37c2d6be3349cd77
author Grace Kao <grace.kao@intel.com> 1586929289 +0800
committer Commit Bot <commit-bot@chromium.org> 1587405760 +0000

FROMLIST: pinctrl: cherryview: Add missing spinlock usage in chv_gpio_irq_handler

According to Braswell NDA Specification Update (#557593),
concurrent read accesses may result in returning 0xffffffff and write
instructions may be dropped. We have an established format for the
commit references, i.e. commit cdca06e4e859
("pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler")

Signed-off-by: Grace Kao <grace.kao@intel.com>
Reported-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>

(am from http://patchwork.ozlabs.org/project/linux-gpio/patch/20200417041154.13063-1-grace.kao@intel.com/)

BUG=b:140090263
TEST=Verified on BSW devices and no found GPIO access causing IRQ fails.

Change-Id: I300b41b138c257a22da04669ed29a399125456db
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2153193
Tested-by: Grace Kao <grace.kao@intel.com>
Tested-by: Radoslaw Biernacki <biernacki@google.com>
Reviewed-by: Alex Levin <levinale@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Radoslaw Biernacki <biernacki@google.com>
Commit-Queue: Brian Norris <briannorris@chromium.org>
Commit-Queue: Alex Levin <levinale@chromium.org>
(cherry picked from commit 082723afd266c2b12fb7d0ba3702c6aa70f257b8)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2157445
Tested-by: Alex Levin <levinale@chromium.org>