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| author | Jacek Anaszewski <j.anaszewski@samsung.com> | 2015-11-20 18:38:50 +0300 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-01-04 11:57:38 +0300 |
| commit | f5db6b8301bf11d8f5422ba8e6cff43add8bd861 (patch) | |
| tree | 279e069cf77a3fed45f0f22ca47f6de1bf2afde6 | |
| parent | ba1c8179c3b8e742eee65bc50bdd1396ac763e0e (diff) | |
| download | linux-f5db6b8301bf11d8f5422ba8e6cff43add8bd861.tar.xz | |
leds: powernv: Implement brightness_set_blocking op
Since brightness setting can sleep for this driver, implement
brightness_set_blocking op, instead of brightness_set.
It makes this driver compatible with LED triggers.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Cc: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
| -rw-r--r-- | drivers/leds/leds-powernv.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/leds/leds-powernv.c b/drivers/leds/leds-powernv.c index bc2d76e3be14..dfb8bd390125 100644 --- a/drivers/leds/leds-powernv.c +++ b/drivers/leds/leds-powernv.c @@ -77,7 +77,7 @@ static int powernv_get_led_type(const char *led_type_desc) * This function is called from work queue task context when ever it gets * scheduled. This function can sleep at opal_async_wait_response call. */ -static void powernv_led_set(struct powernv_led_data *powernv_led, +static int powernv_led_set(struct powernv_led_data *powernv_led, enum led_brightness value) { int rc, token; @@ -99,7 +99,7 @@ static void powernv_led_set(struct powernv_led_data *powernv_led, if (token != -ERESTARTSYS) dev_err(dev, "%s: Couldn't get OPAL async token\n", __func__); - return; + return token; } rc = opal_leds_set_ind(token, powernv_led->loc_code, @@ -125,6 +125,7 @@ static void powernv_led_set(struct powernv_led_data *powernv_led, out_token: opal_async_release_token(token); + return rc; } /* @@ -173,20 +174,23 @@ static enum led_brightness powernv_led_get(struct powernv_led_data *powernv_led) * LED classdev 'brightness_get' function. This schedules work * to update LED state. */ -static void powernv_brightness_set(struct led_classdev *led_cdev, +static int powernv_brightness_set(struct led_classdev *led_cdev, enum led_brightness value) { struct powernv_led_data *powernv_led = container_of(led_cdev, struct powernv_led_data, cdev); struct powernv_led_common *powernv_led_common = powernv_led->common; + int rc; /* Do not modify LED in unload path */ if (powernv_led_common->led_disabled) - return; + return 0; mutex_lock(&powernv_led_common->lock); - powernv_led_set(powernv_led, value); + rc = powernv_led_set(powernv_led, value); mutex_unlock(&powernv_led_common->lock); + + return rc; } /* LED classdev 'brightness_get' function */ @@ -227,7 +231,7 @@ static int powernv_led_create(struct device *dev, return -ENOMEM; } - powernv_led->cdev.brightness_set = powernv_brightness_set; + powernv_led->cdev.brightness_set_blocking = powernv_brightness_set; powernv_led->cdev.brightness_get = powernv_brightness_get; powernv_led->cdev.brightness = LED_OFF; powernv_led->cdev.max_brightness = LED_FULL; |