leds: trigger: netdev: Use mutex instead of spinlocks

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Some LEDs may require to sleep while doing some operation like setting
brightness and other cleanup.

For this reason, using a spinlock will cause a sleep under spinlock
warning.

It should be safe to convert this to a sleepable lock since:
- sysfs read/write can sleep
- netdev_trig_work is a work queue and can sleep
- netdev _trig_notify can sleep

The spinlock was used when brightness didn't support sleeping, but this
changed and now it supported with brightness_set_blocking().

Convert to mutex lock to permit sleeping using brightness_set_blocking().

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230419210743.3594-6-ansuelsmth@gmail.com

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Christian Marangi 2023-04-19 23:07:43 +02:00 • committed by Lee Jones

parent 164b67d534

commit d1b9e1391a

1 changed files with 9 additions and 9 deletions

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drivers/leds/trigger/ledtrig-netdev.c

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