Commit 819bee01 authored by Dmitry Baryshkov's avatar Dmitry Baryshkov
Browse files

drm/amd/display: 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>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-4-c9bce1ee8bea@linaro.org


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent 39ead6e0

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+2 −0
Original line number Diff line number Diff line
@@ -1037,8 +1037,10 @@ static int amdgpu_dm_audio_component_get_eld(struct device *kdev, int port, 
			continue;



		*enabled = true;

		mutex_lock(&connector->eld_mutex);

		ret = drm_eld_size(connector->eld);

		memcpy(buf, connector->eld, min(max_bytes, ret));

		mutex_unlock(&connector->eld_mutex);



		break;

	}