Commit e99c0b51 authored by Dmitry Baryshkov's avatar Dmitry Baryshkov
Browse files

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: default avatarMaxime Ripard <mripard@kernel.org>
Acked-by: default avatarRaphael 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: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent b54c14f8

drivers/gpu/drm/sti/sti_hdmi.c

+2 −0
Original line number Diff line number Diff line
@@ -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;

}