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@xxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/bridge/ite-it66121.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
index 35ae3f0e8f51f768229e055a086b53a419ffcd9f..940083e5d2ddbfc56f14e2bdc6ddd0b9dd50b1f8 100644
--- a/drivers/gpu/drm/bridge/ite-it66121.c
+++ b/drivers/gpu/drm/bridge/ite-it66121.c
@@ -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);
--
2.39.5
