summaryrefslogtreecommitdiffstats
path: root/drivers/pwm
diff options
context:
space:
mode:
authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2021-04-23 18:59:02 +0200
committerThierry Reding <thierry.reding@gmail.com>2021-06-28 13:27:01 +0200
commitad5e085c63f59391f5cfbde64fbff192872dfe8f (patch)
treef6ad0ecdec704c963115baeec53199f33beb43c7 /drivers/pwm
parent66a03c4fd9e95e192c574811a1f4ea8f62992358 (diff)
downloadlinux-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')
-rw-r--r--drivers/pwm/core.c16
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);