diff options
| author | Jakub Kicinski <[email protected]> | 2023-03-09 22:18:59 -0800 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2023-03-09 22:22:11 -0800 |
| commit | d0ddf5065ffef45f8fce4001abe0206081c7ff10 (patch) | |
| tree | ea83817cbe9fc25261eae87b85afd9fe086f479e /drivers/pwm/pwm-sifive.c | |
| parent | db47fa2e4cbf180a39d8e6d6170962bd7d82e52d (diff) | |
| parent | 44889ba56cbb3d51154660ccd15818bc77276696 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Documentation/bpf/bpf_devel_QA.rst
b7abcd9c656b ("bpf, doc: Link to submitting-patches.rst for general patch submission info")
d56b0c461d19 ("bpf, docs: Fix link to netdev-FAQ target")
https://lore.kernel.org/all/[email protected]/
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'drivers/pwm/pwm-sifive.c')
| -rw-r--r-- | drivers/pwm/pwm-sifive.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c index 62b6acc6373d..393a4b97fc19 100644 --- a/drivers/pwm/pwm-sifive.c +++ b/drivers/pwm/pwm-sifive.c @@ -161,7 +161,13 @@ static int pwm_sifive_apply(struct pwm_chip *chip, struct pwm_device *pwm, mutex_lock(&ddata->lock); if (state->period != ddata->approx_period) { - if (ddata->user_count != 1) { + /* + * Don't let a 2nd user change the period underneath the 1st user. + * However if ddate->approx_period == 0 this is the first time we set + * any period, so let whoever gets here first set the period so other + * users who agree on the period won't fail. + */ + if (ddata->user_count != 1 && ddata->approx_period) { mutex_unlock(&ddata->lock); return -EBUSY; } |