From: Dmitry Baryshkov Date: Fri, 6 Dec 2024 09:43:07 +0000 (+0200) Subject: drm/amd/display: use eld_mutex to protect access to connector->eld X-Git-Tag: v6.14-rc1~174^2~13^2~47 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=819bee01eea06282d7bda17d46caf29cae4f6d84;p=thirdparty%2Fkernel%2Flinux.git drm/amd/display: 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 Reviewed-by: Harry Wentland Link: https://patchwork.freedesktop.org/patch/msgid/20241206-drm-connector-eld-mutex-v2-4-c9bce1ee8bea@linaro.org Signed-off-by: Dmitry Baryshkov --- diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 243cee2841312..dea640816e190 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1037,8 +1037,10 @@ static int amdgpu_dm_audio_component_get_eld(struct device *kdev, int port, continue; *enabled = true; + mutex_lock(&connector->eld_mutex); ret = drm_eld_size(connector->eld); memcpy(buf, connector->eld, min(max_bytes, ret)); + mutex_unlock(&connector->eld_mutex); break; }