diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2022-12-02 19:35:05 +0100 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2022-12-06 12:46:03 +0100 |
| commit | 45558b3abb87eeb2cedb8a59cb2699c120b5102a (patch) | |
| tree | c27fe0730d0ce2659113a4250eb5bcf50277da17 /drivers/pwm/pwm-stm32-lp.c | |
| parent | 7d9199995412fd30ea79e24d6c29f04a9b5d49ee (diff) | |
| download | linux-45558b3abb87eeb2cedb8a59cb2699c120b5102a.tar.gz linux-45558b3abb87eeb2cedb8a59cb2699c120b5102a.tar.bz2 linux-45558b3abb87eeb2cedb8a59cb2699c120b5102a.zip | |
pwm: sifive: Call pwm_sifive_update_clock() while mutex is held
As was documented in commit 0f02f491b786 ("pwm: sifive: Reduce time the
controller lock is held") a caller of pwm_sifive_update_clock() must
hold the mutex. So fix pwm_sifive_clock_notifier() to grab the lock.
While this necessity was only documented later, the race exists since
the driver was introduced.
Fixes: 9e37a53eb051 ("pwm: sifive: Add a driver for SiFive SoC PWM")
Reported-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Link: https://lore.kernel.org/r/20221018061656.1428111-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-stm32-lp.c')
0 files changed, 0 insertions, 0 deletions