This is a note to let you know that I've just added the patch titled
drm/crtc: fix uninitialized variable use even harder
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-crtc-fix-uninitialized-variable-use-even-harder.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 98824ce93214049d4c8b9bf9e7feb766c5cbc33a
Author: Rob Clark <robdclark@xxxxxxxxxxxx>
Date: Mon Feb 12 13:55:34 2024 -0800
drm/crtc: fix uninitialized variable use even harder
[ Upstream commit b6802b61a9d0e99dcfa6fff7c50db7c48a9623d3 ]
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>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> # sc7180, sdm845
Link: https://patchwork.freedesktop.org/patch/msgid/20240212215534.190682-1-robdclark@xxxxxxxxx
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 85d85a0ba85f9..da45cfd2939cf 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -727,6 +727,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
connector_set = NULL;
fb = NULL;
mode = NULL;
+ num_connectors = 0;
DRM_MODESET_LOCK_ALL_END(ctx, ret);
mutex_unlock(&crtc->dev->mode_config.mutex);
