linux-kernel - Re: [PATCH] drm/gud: fix NULL fb and crtc dereferences on USB disconnect

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Message-ID: <65110c51-1f47-4382-ac92-518c7f157a06@shenghaoyang.info>
Date: Thu, 8 Jan 2026 21:39:27 +0800
From: Shenghao Yang <me@...nghaoyang.info>
To: Thomas Zimmermann <tzimmermann@...e.de>, Ruben Wauters
 <rubenru09@....com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 stable@...r.kernel.org
Subject: Re: [PATCH] drm/gud: fix NULL fb and crtc dereferences on USB
 disconnect

Hi Ruben, Thomas,

On 7/1/26 23:56, Thomas Zimmermann wrote:

> 
> No worries, DRM semantics can be murky. This is one of the cases that is impossible to know unless you came across a patch like this one.
> 
> Best regards
> Thomas
> 
>>> I think the patch is fine and IIRC we have similar logic in other drivers.
>> Reviewed-by: Ruben Wauters <rubenru09@....com>
>>
>> I believe Shenghao mentioned another oops that is present? if so it may
>> be best to submit that in a separate patch rather than a v2 of this
>> one.
>>
>> Ruben


Thanks both! I'll split the patch for the second oops.

Shenghao