diff options
| author | Sudeep Holla <Sudeep.Holla@arm.com> | 2016-08-25 12:23:39 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-11-20 01:17:34 +0000 |
| commit | f1790ee2d43355e0d1cf9392a5de8bb47e016540 (patch) | |
| tree | 7472d3411db93dc155afa35497e4c24a08addffc /include/linux/kdebug.h | |
| parent | ca0e1ef2b995d04b3db638fd56c3b4e2223e8c8d (diff) | |
i2c: qup: skip qup_i2c_suspend if the device is already runtime suspended
commit 331dcf421c34d227784d07943eb01e4023a42b0a upstream.
If the i2c device is already runtime suspended, if qup_i2c_suspend is
executed during suspend-to-idle or suspend-to-ram it will result in the
following splat:
WARNING: CPU: 3 PID: 1593 at drivers/clk/clk.c:476 clk_core_unprepare+0x80/0x90
Modules linked in:
CPU: 3 PID: 1593 Comm: bash Tainted: G W 4.8.0-rc3 #14
Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
PC is at clk_core_unprepare+0x80/0x90
LR is at clk_unprepare+0x28/0x40
pc : [<ffff0000086eecf0>] lr : [<ffff0000086f0c58>] pstate: 60000145
Call trace:
clk_core_unprepare+0x80/0x90
qup_i2c_disable_clocks+0x2c/0x68
qup_i2c_suspend+0x10/0x20
platform_pm_suspend+0x24/0x68
...
This patch fixes the issue by executing qup_i2c_pm_suspend_runtime
conditionally in qup_i2c_suspend.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux/kdebug.h')
0 files changed, 0 insertions, 0 deletions