Commit 39ead6e0 authored by Dmitry Baryshkov's avatar Dmitry Baryshkov
Browse files

drm/bridge: ite-it66121: 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>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-3-c9bce1ee8bea@linaro.org


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
parent e72bf423

drivers/gpu/drm/bridge/ite-it66121.c

+2 −0
Original line number Diff line number Diff line
@@ -1450,8 +1450,10 @@ static int it66121_audio_get_eld(struct device *dev, void *data, 
		dev_dbg(dev, "No connector present, passing empty EDID data");

		memset(buf, 0, len);

	} else {

		mutex_lock(&ctx->connector->eld_mutex);

		memcpy(buf, ctx->connector->eld,

		       min(sizeof(ctx->connector->eld), len));

		mutex_unlock(&ctx->connector->eld_mutex);

	}

	mutex_unlock(&ctx->lock);