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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-12-06 11:43:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 10:04:47 +0100 |
| commit | 1cd3e56a07acd34cc389d490a259ad2a1dd6f282 (patch) | |
| tree | 492168370e7450e0f2b7be03bf19215bb716e1cc /drivers/gpu | |
| parent | 6b57c63f5bf64ffd8d54ba24c027d59f85125306 (diff) | |
| download | linux-1cd3e56a07acd34cc389d490a259ad2a1dd6f282.tar.gz linux-1cd3e56a07acd34cc389d490a259ad2a1dd6f282.tar.bz2 linux-1cd3e56a07acd34cc389d490a259ad2a1dd6f282.zip | |
drm/radeon: use eld_mutex to protect access to connector->eld
[ Upstream commit b54c14f82428c8a602392d4cae1958a71a578132 ]
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>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-8-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/radeon/radeon_audio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_audio.c b/drivers/gpu/drm/radeon/radeon_audio.c index 5b69cc8011b4..8d64ba18572e 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; } |