evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

pwm: Mark all devices as "might sleep"

Browse source 
commit ff01c944cfa939f3474c28d88223213494aedf0b upstream.

Commit d1cd214277 ("pwm: Set enable state properly on failed call to
enable") introduced a mutex that is needed to protect internal state of
PWM devices. Since that mutex is acquired in pwm_set_polarity() and in
pwm_enable() and might potentially block, all PWM devices effectively
become "might sleep".

It's rather pointless to keep the .can_sleep field around, but given
that there are external users let's postpone the removal for the next
release cycle.

Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes: d1cd214277 ("pwm: Set enable state properly on failed call to enable")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Thierry Reding 2016-01-21 15:04:59 +01:00 • committed by Greg Kroah-Hartman
parent fd2e3102ad
commit 9aea5e0ded
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/pwm/core.c
View file

@ -889,7 +889,7 @@ EXPORT_SYMBOL_GPL(devm_pwm_put);
*/
bool pwm_can_sleep(struct pwm_device *pwm)
{
return pwm->chip->can_sleep;
return true;
}
EXPORT_SYMBOL_GPL(pwm_can_sleep);