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drm/msm/dp: use eld_mutex to protect access to connector->eld

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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>
Acked-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-7-c9bce1ee8bea@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Dmitry Baryshkov 2024-12-06 11:43:10 +02:00
parent 5db44dd152
commit 9aad030dc6
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/msm/dp/dp_audio.c
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@ -414,8 +414,10 @@ static int msm_dp_audio_get_eld(struct device *dev,
return -ENODEV;
}
mutex_lock(&msm_dp_display->connector->eld_mutex);
memcpy(buf, msm_dp_display->connector->eld,
min(sizeof(msm_dp_display->connector->eld), len));
mutex_unlock(&msm_dp_display->connector->eld_mutex);
return 0;
}