diff mbox series

[08/10] drm/radeon: use eld_mutex to protect access to connector->eld

Message ID 20241201-drm-connector-eld-mutex-v1-8-ba56a6545c03@linaro.org (mailing list archive)
State Not Applicable
Headers show
Series drm/connector: add eld_mutex to protect connector->eld | expand

Commit Message

Dmitry Baryshkov Nov. 30, 2024, 11:55 p.m. UTC 
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.baryshkov@linaro.org>
---
 drivers/gpu/drm/radeon/radeon_audio.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/radeon/radeon_audio.c b/drivers/gpu/drm/radeon/radeon_audio.c
index 47aa06a9a94221555a4828f41a57cbe03d637ee1..547d8f420669cdb949ffebd0677ddb8cc3c25812 100644
--- a/drivers/gpu/drm/radeon/radeon_audio.c
+++ b/drivers/gpu/drm/radeon/radeon_audio.c
@@ -771,8 +771,10 @@  static int radeon_audio_component_get_eld(struct device *kdev, int port,
 		if (!connector)
 			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;
 	}