diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-12-06 12:43:07 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-12-16 19:02:08 +0300 |
| commit | 819bee01eea06282d7bda17d46caf29cae4f6d84 (patch) | |
| tree | f02fbf6433988fa4168044028fdf42eb69075845 | |
| parent | 39ead6e02ea7d19b421e9d42299d4293fed3064e (diff) | |
| download | linux-819bee01eea06282d7bda17d46caf29cae4f6d84.tar.xz | |
drm/amd/display: 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: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-4-c9bce1ee8bea@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 243cee284131..dea640816e19 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1037,8 +1037,10 @@ static int amdgpu_dm_audio_component_get_eld(struct device *kdev, int 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; } |