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[v2,08/10] drm/radeon: use eld_mutex to protect access to connector->eld

Message ID 20241206-drm-connector-eld-mutex-v2-8-c9bce1ee8bea@linaro.org (mailing list archive)
State New, archived
Headers show
Series drm/connector: add eld_mutex to protect connector->eld | expand

Commit Message

Dmitry Baryshkov Dec. 6, 2024, 9:43 a.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.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
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 5b69cc8011b42b4686c02f97a2b451a63d6c346d..8d64ba18572ec4bb6f6985be3a5edf581c47d7a3 100644
--- a/drivers/gpu/drm/radeon/radeon_audio.c
+++ b/drivers/gpu/drm/radeon/radeon_audio.c
@@ -775,8 +775,10 @@  static int radeon_audio_component_get_eld(struct device *kdev, int port,
 		if (!dig->pin || dig->pin->id != 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;
 	}