From: Dmitry Baryshkov Date: Fri, 6 Dec 2024 09:43:12 +0000 (+0200) Subject: drm/sti: hdmi: use eld_mutex to protect access to connector->eld X-Git-Tag: v6.14-rc1~174^2~13^2~42 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e99c0b517bcd53cf61f998a3c4291333401cb391;p=thirdparty%2Fkernel%2Flinux.git drm/sti: hdmi: use eld_mutex to protect access to connector->eld 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 Acked-by: Raphael Gallais-Pou Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-9-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov --- diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c index 21b46a6465f08..f8bbae6393ef8 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -1225,7 +1225,9 @@ static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size struct drm_connector *connector = hdmi->drm_connector; DRM_DEBUG_DRIVER("\n"); + mutex_lock(&connector->eld_mutex); memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); + mutex_unlock(&connector->eld_mutex); return 0; }