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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-12-06 11:43:05 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 11:35:57 +0100 |
| commit | 4ef005242631e3a236b8e05b67cf2c98d54f6418 (patch) | |
| tree | 397660afe6edfeb47bf223f57ac5f901085dd307 | |
| parent | 7608bc96cd02ef23bb5d47d5e9fec911c3ef07ae (diff) | |
| download | linux-4ef005242631e3a236b8e05b67cf2c98d54f6418.tar.gz linux-4ef005242631e3a236b8e05b67cf2c98d54f6418.tar.bz2 linux-4ef005242631e3a236b8e05b67cf2c98d54f6418.zip | |
drm/bridge: anx7625: use eld_mutex to protect access to connector->eld
[ Upstream commit e72bf423a60afd744d13e40ab2194044a3af5217 ]
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-v2-2-c9bce1ee8bea@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/anx7625.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index a2675b121fe4..c036bbc92ba9 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2002,8 +2002,10 @@ static int anx7625_audio_get_eld(struct device *dev, void *data, memset(buf, 0, len); } else { dev_dbg(dev, "audio copy eld\n"); + mutex_lock(&ctx->connector->eld_mutex); memcpy(buf, ctx->connector->eld, min(sizeof(ctx->connector->eld), len)); + mutex_unlock(&ctx->connector->eld_mutex); } return 0; |