From: Dmitry Baryshkov <dmitry.barysh...@linaro.org> [ Upstream commit 9aad030dc64f6994dc5de7bb81ceca55dbc555c3 ]
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 <mrip...@kernel.org> Acked-by: Abhinav Kumar <quic_abhin...@quicinc.com> Reviewed-by: Abhinav Kumar <quic_abhin...@quicinc.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-7-c9bce1ee8...@linaro.org Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org> Signed-off-by: Sasha Levin <sas...@kernel.org> --- drivers/gpu/drm/msm/dp/dp_audio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c index 74e01a5dd4195..0fd5e0abaf078 100644 --- a/drivers/gpu/drm/msm/dp/dp_audio.c +++ b/drivers/gpu/drm/msm/dp/dp_audio.c @@ -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; } -- 2.39.5
