leds: turris-omnia: Drop unnecessary mutex locking
[ Upstream commit 760b6b79 ] Do not lock driver mutex in the global LED panel brightness sysfs accessors brightness_show() and brightness_store(). The mutex locking is unnecessary here. The I2C transfers are guarded by I2C core locking mechanism, and the LED commands itself do not interfere with other commands. Fixes: 089381b2 ("leds: initial support for Turris Omnia LEDs") Signed-off-by: Marek Behún <kabel@kernel.org> Reviewed-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20230802160748.11208-2-kabel@kernel.org Signed-off-by: Lee Jones <lee@kernel.org> Stable-dep-of: 6de283b9 ("leds: turris-omnia: Do not use SMBUS calls") Signed-off-by: Sasha Levin <sashal@kernel.org>
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