From: Dan Carpenter <error27@gmail.com>
To: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: "Markus Elfring" <Markus.Elfring@web.de>,
intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org,
dri-devel@lists.freedesktop.org,
"David Airlie" <airlied@gmail.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Tvrtko Ursulin" <tursulin@ursulin.net>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
kernel-janitors@vger.kernel.org
Subject: Re: [PATCH] drm/i915/bios: Move a variable assignment behind a null pointer check in intel_bios_encoder_supports_dp_dual_mode()
Date: Tue, 14 Jul 2026 18:46:06 +0300 [thread overview]
Message-ID: <alZZviFT2jfABiZq@stanley.mountain> (raw)
In-Reply-To: <alZVl0o7uBoncUos@intel.com>
On Tue, Jul 14, 2026 at 11:28:23AM -0400, Rodrigo Vivi wrote:
> On Mon, Jul 13, 2026 at 04:05:53PM +0200, Markus Elfring wrote:
> > From: Markus Elfring <elfring@users.sourceforge.net>
> > Date: Mon, 13 Jul 2026 15:56:46 +0200
> >
> > The address of a data structure member was determined before
> > a corresponding null pointer check in the implementation of
> > the function “intel_bios_encoder_supports_dp_dual_mode”.
> >
> > Thus avoid the risk for undefined behaviour by reducing the scope for
> > the variable “child” behind condition checks.
> >
> > This issue was detected by using the Coccinelle software.
> >
> > Fixes: 044cbc7a74c136f12a80c855cadd1b085084aef1 ("drm/i915/bios: Nuke DEVICE_TYPE_DP_DUAL_MODE_BITS")
> > Cc: stable@vger.kernel.org
Please stop adding Fixes tags to these and talking about "undefined
behavior" in the commit message. Pointer math is defined... It's
just a style preference on your part.
regards,
dan carpenter
next prev parent reply other threads:[~2026-07-14 15:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-13 14:05 [PATCH] drm/i915/bios: Move a variable assignment behind a null pointer check in intel_bios_encoder_supports_dp_dual_mode() Markus Elfring
2026-07-14 14:09 ` ✗ LGCI.VerificationFailed: failure for " Patchwork
2026-07-14 14:52 ` Patchwork
2026-07-14 15:28 ` [PATCH] " Rodrigo Vivi
2026-07-14 15:46 ` Dan Carpenter [this message]
2026-07-14 16:10 ` Markus Elfring
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