From: Dmitry Baryshkov <dmitry.barysh...@linaro.org> [ Upstream commit 5e8436d334ed7f6785416447c50b42077c6503e0 ]
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> Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-5-c9bce1ee8...@linaro.org Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org> Signed-off-by: Sasha Levin <sas...@kernel.org> --- drivers/gpu/drm/exynos/exynos_hdmi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index 906133331a442..c234f9245b144 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -1643,7 +1643,9 @@ static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, struct hdmi_context *hdata = dev_get_drvdata(dev); struct drm_connector *connector = &hdata->connector; + mutex_lock(&connector->eld_mutex); memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + mutex_unlock(&connector->eld_mutex); return 0; } -- 2.39.5
