Re: [PATCH] drm/crtc: fix uninitialized variable use even harder

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On 2/12/2024 1:55 PM, Rob Clark wrote:
From: Rob Clark <robdclark@xxxxxxxxxxxx>

DRM_MODESET_LOCK_ALL_BEGIN() has a hidden trap-door (aka retry loop),
which means we can't rely too much on variable initializers.

Fixes: 6e455f5dcdd1 ("drm/crtc: fix uninitialized variable use")
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
I have mixed feelings about DRM_MODESET_LOCK_ALL_BEGIN() (and friends)
magic.  On one hand it simplifies the deadlock/back dance.  OTOH it
conceals a nasty sharp edge.  Maybe it is better to have the complicated
restart path a bit more explicit, like it was originally.

  drivers/gpu/drm/drm_crtc.c | 1 +
  1 file changed, 1 insertion(+)

Nice catch !!

Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>



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