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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-04-23 18:59:02 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2021-06-28 13:27:01 +0200 |
| commit | ad5e085c63f59391f5cfbde64fbff192872dfe8f (patch) | |
| tree | f6ad0ecdec704c963115baeec53199f33beb43c7 /drivers/pwm/core.c | |
| parent | 66a03c4fd9e95e192c574811a1f4ea8f62992358 (diff) | |
| download | linux-ad5e085c63f59391f5cfbde64fbff192872dfe8f.tar.bz2 | |
pwm: Drop irrelevant error path from pwmchip_remove()
Since the PWM core uses device links (commit b2c200e3f2fd ("pwm: Add
consumer device link")) each consumer driver that requested the PWMs is
already gone. If they called pwm_put() (as they should) the
PWMF_REQUESTED bit is not set. If they failed (which is a bug) the
PWMF_REQUESTED bit might still be set, but the driver that cared is
gone, so nothing bad happens if the PWM chip goes away even if the
PWMF_REQUESTED is still present.
So the check can be dropped.
With this change pwmchip_remove() returns always 0, so lowlevel drivers
don't need to check the return code any more. Once all drivers dropped
this check this function can be changed to return void.
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/core.c')
| -rw-r--r-- | drivers/pwm/core.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 83db178f16bb..a88e13c8a53c 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -306,22 +306,10 @@ EXPORT_SYMBOL_GPL(pwmchip_add); */ int pwmchip_remove(struct pwm_chip *chip) { - unsigned int i; - int ret = 0; - pwmchip_sysfs_unexport(chip); mutex_lock(&pwm_lock); - for (i = 0; i < chip->npwm; i++) { - struct pwm_device *pwm = &chip->pwms[i]; - - if (test_bit(PWMF_REQUESTED, &pwm->flags)) { - ret = -EBUSY; - goto out; - } - } - list_del_init(&chip->list); if (IS_ENABLED(CONFIG_OF)) @@ -329,9 +317,9 @@ int pwmchip_remove(struct pwm_chip *chip) free_pwms(chip); -out: mutex_unlock(&pwm_lock); - return ret; + + return 0; } EXPORT_SYMBOL_GPL(pwmchip_remove); |