This is a note to let you know that I've just added the patch titled
drm/vc4: hdmi: use eld_mutex to protect access to connector->eld
to the 6.12-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-vc4-hdmi-use-eld_mutex-to-protect-access-to-conn.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 648e50727a5df9ebba4d13a636e1bb3e1e1d753b
Author: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Date: Fri Dec 6 11:43:13 2024 +0200
drm/vc4: hdmi: use eld_mutex to protect access to connector->eld
[ Upstream commit 81a9a93b169a273ccc4a9a1ee56f17e9981d3f98 ]
Reading access to connector->eld can happen at the same time the
drm_edid_to_eld() updates the data. Take the newly added eld_mutex in
order to protect connector->eld from concurrent access.
Reviewed-by: Maxime Ripard <mripard@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-10-c9bce1ee8bea@xxxxxxxxxx
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 7e0a5ea7ab859..6b83d02b5d62a 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -2192,9 +2192,9 @@ static int vc4_hdmi_audio_get_eld(struct device *dev, void *data,
struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
struct drm_connector *connector = &vc4_hdmi->connector;
- mutex_lock(&vc4_hdmi->mutex);
+ mutex_lock(&connector->eld_mutex);
memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
- mutex_unlock(&vc4_hdmi->mutex);
+ mutex_unlock(&connector->eld_mutex);
return 0;
}
