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From: Thierry Reding <thierry.reding@kernel.org>
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Mikko Perttunen <mperttunen@nvidia.com>,
	 David Airlie <airlied@gmail.com>,
	Simona Vetter <simona@ffwll.ch>,
	 Jonathan Hunter <jonathanh@nvidia.com>,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	 dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org
Subject: Re: [PATCH] drm/tegra: Fix a strange error handling path
Date: Mon, 22 Jun 2026 08:49:19 +0200	[thread overview]
Message-ID: <ajjaW_fGdHWPZr9K@orome> (raw)
In-Reply-To: <308ea09281bd0b3fb0ec7e90e23012c0783f373c.1781983379.git.christophe.jaillet@wanadoo.fr>

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On Sat, Jun 20, 2026 at 09:23:14PM +0200, Christophe JAILLET wrote:
> The resource freed at the 'put_aux' label is "sor->aux->dev".
> However, this resource is taken after devm_tegra_pmc_get(), so there is no
> point to release it in this error handling path.
> 
> This is harmless because put_device() will be called with a NULL pointer,
> but this is confusing.
> 
> So, fix the logic and return directly.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested only.
> 
> This is not a bug, so no need for a Fixes tag.
> If needed anyway, it was introduced by commit e68c4244136b ("drm/tegra:
> Explicitly specify PMC instance to use")
> ---
>  drivers/gpu/drm/tegra/sor.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)

Good catch! Looks like I used the put_aux label without realizing that
sor->aux isn't acquired until *after* sor->pmc here.

Thanks for fixing this,
Thierry

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  reply	other threads:[~2026-06-22  6:49 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-20 19:23 [PATCH] drm/tegra: Fix a strange error handling path Christophe JAILLET
2026-06-22  6:49 ` Thierry Reding [this message]
2026-06-22  6:50 ` Thierry Reding

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