Re: [PATCH v3] leds: lp5860: Fix LED teardown ordering using devm_add_action_or_reset()

[sashiko-bot@kernel.org]

> From: Surendra Singh Chouhan <kr494167@gmail.com>
> 
> The driver previously disabled the chip in its remove callback before
> devres unregistered the LEDs. LED unregistration turns the LEDs off
> through the driver brightness callback, which accessed disabled hardware.
> 
> Fix this by registering a devm action via devm_add_action_or_reset()
> immediately after enabling the chip in lp5860_device_init(). Due to devm
> LIFO (Last-In, First-Out) teardown ordering, devm will automatically
> unregister all multicolor LEDs before the devm action disables the chip.
> 
> In addition, use scoped_guard(mutex, &lp->lock) to restrict the initial
> mode setting lock scope, avoiding holding the mutex across
> lp5860_init_dt(), which would cause a self-deadlock when registering
> subleds.
> 
> Finally, convert mutex_init() to devm_mutex_init() and declare the local
> variable ret in lp5860_probe(), allowing lp5860_device_remove() and
> lp5860_remove() to be removed completely.
> 
> Fixes: f0a66563aa2d ("leds: Add support for TI LP5860 LED driver chip")
> Signed-off-by: Surendra Singh Chouhan <kr494167@gmail.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/20260812135001.48949-1-kr494167@gmail.com?part=1