[PATCH 02/10] drm/bridge: anx7625: use eld_mutex to protect access to connector->eld

[Dmitry Baryshkov]

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.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c 
b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 
a2675b121fe44b96945f34215fd900f35bfde43a..c036bbc92ba96ec4663c55cca091cd5da9f6d271
 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -2002,8 +2002,10 @@ static int anx7625_audio_get_eld(struct device *dev, 
void *data,
                memset(buf, 0, len);
        } else {
                dev_dbg(dev, "audio copy eld\n");
+               mutex_lock(&ctx->connector->eld_mutex);
                memcpy(buf, ctx->connector->eld,
                       min(sizeof(ctx->connector->eld), len));
+               mutex_unlock(&ctx->connector->eld_mutex);
        }
 
        return 0;

-- 
2.39.5