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authorDmitry Baryshkov <dmitry.baryshkov@linaro.org>2024-12-06 11:43:12 +0200
committerDmitry Baryshkov <dmitry.baryshkov@linaro.org>2024-12-16 18:02:08 +0200
commite99c0b517bcd53cf61f998a3c4291333401cb391 (patch)
tree9d97b59261e72ec6c2088079afb7dd105414b65f
parentb54c14f82428c8a602392d4cae1958a71a578132 (diff)
drm/sti: hdmi: use eld_mutex to protect access to connector->eld
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@kernel.org> Acked-by: Raphael Gallais-Pou <rgallaispou@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-9-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
-rw-r--r--drivers/gpu/drm/sti/sti_hdmi.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index 21b46a6465f0..f8bbae6393ef 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -1225,7 +1225,9 @@ static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size
struct drm_connector *connector = hdmi->drm_connector;
DRM_DEBUG_DRIVER("\n");
+ mutex_lock(&connector->eld_mutex);
memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
+ mutex_unlock(&connector->eld_mutex);
return 0;
}