linux-kernel - Re: [PATCH] thermal/drivers/mediatek/lvts: Fix debugfs unregister on failure

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Message-ID: <CAGXv+5Fo3-5J1Tyn1JGP0+aTeCnkUJhwxiuLt71MLUp-zVSCkg@mail.gmail.com>
Date: Wed, 2 Apr 2025 17:20:47 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: rafael@...nel.org, daniel.lezcano@...aro.org, rui.zhang@...el.com, 
	lukasz.luba@....com, matthias.bgg@...il.com, npitre@...libre.com, 
	jpanis@...libre.com, nfraprado@...labora.com, bchihi@...libre.com, 
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
	kernel@...labora.com
Subject: Re: [PATCH] thermal/drivers/mediatek/lvts: Fix debugfs unregister on failure

On Wed, Apr 2, 2025 at 4:39 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> When running the probe function for this driver, the function
> lvts_debugfs_init() gets called in lvts_domain_init() which, in
> turn, gets called in lvts_probe() before registering threaded
> interrupt handlers.
>
> Even though it's unlikely, the last call may fail and, if it does,
> there's nothing removing the already created debugfs folder and
> files.
>
> In order to fix that, instead of calling the lvts debugfs cleanup
> function upon failure, register a devm action that will take care
> of calling that upon failure or driver removal.
>
> Since devm was used, also delete the call to lvts_debugfs_exit()
> in the lvts_remove() callback, as now that's done automatically.
>
> Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>