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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-12-06 11:43:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 10:04:47 +0100 |
| commit | cd604e8e993cd6f6e8aab0a8d23052885de60472 (patch) | |
| tree | 3be98433f2427ea1974d272a577baaed354ce2bf /drivers/gpu | |
| parent | f1b4a5005c9e3a7078bd57909a8b5277996ae921 (diff) | |
| download | linux-cd604e8e993cd6f6e8aab0a8d23052885de60472.tar.gz linux-cd604e8e993cd6f6e8aab0a8d23052885de60472.tar.bz2 linux-cd604e8e993cd6f6e8aab0a8d23052885de60472.zip | |
drm/amd/display: use eld_mutex to protect access to connector->eld
[ Upstream commit 819bee01eea06282d7bda17d46caf29cae4f6d84 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu')
| -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 08c58d0315de..f35ec11086ea 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1036,8 +1036,10 @@ 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; } |