leds: core: avoid error message when a USB LED device is unplugged
When a USB LED device is unplugged the remove call chain calls
led_classdev_unregister which tries to switch the LED off.
As the device has been removed already this results in a ENODEV
error message in dmesg.
Avoid this error message by ignoring ENODEV in calls from
led_classdev_unregister if the LED device is flagged as pluggable.
Therefore a new flag LED_HW_PLUGGABLE was introduced which should be set by
all LED drivers handling pluggable LED devices (mainly USB LED devices).
Signed-off-by: Heiner Kallweit <[email protected]>
Signed-off-by: Jacek Anaszewski <[email protected]>
diff --git a/include/linux/leds.h b/include/linux/leds.h
index e3470e7..f203a8f 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -39,6 +39,7 @@
/* Lower 16 bits reflect status */
#define LED_SUSPENDED (1 << 0)
+#define LED_UNREGISTERING (1 << 1)
/* Upper 16 bits reflect control information */
#define LED_CORE_SUSPENDRESUME (1 << 16)
#define LED_BLINK_ONESHOT (1 << 17)
@@ -48,6 +49,7 @@
#define LED_BLINK_DISABLE (1 << 21)
#define LED_SYSFS_DISABLE (1 << 22)
#define LED_DEV_CAP_FLASH (1 << 23)
+#define LED_HW_PLUGGABLE (1 << 24)
/* Set LED brightness level
* Must not sleep. Use brightness_set_blocking for drivers
