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drm/radeon/audio: make sure connector is valid in hotplug case 

Avoids a crash when a monitor is hotplugged and the encoder
and connector are not linked yet.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=90681

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2015-05-27 11:33:26 -04:00
parent 2d1c18bba1
commit fbfd3bc7df
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/radeon/evergreen_hdmi.c
View File

@ -400,7 +400,7 @@ void evergreen_hdmi_enable(struct drm_encoder *encoder, bool enable)
if (enable) {
struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
if (drm_detect_monitor_audio(radeon_connector_edid(connector))) {
if (connector && drm_detect_monitor_audio(radeon_connector_edid(connector))) {
WREG32(HDMI_INFOFRAME_CONTROL0 + dig->afmt->offset,
HDMI_AVI_INFO_SEND | /* enable AVI info frames */
HDMI_AVI_INFO_CONT | /* required for audio info values to be updated */
@ -438,7 +438,8 @@ void evergreen_dp_enable(struct drm_encoder *encoder, bool enable)
if (!dig || !dig->afmt)
return;
if (enable && drm_detect_monitor_audio(radeon_connector_edid(connector))) {
if (enable && connector &&
drm_detect_monitor_audio(radeon_connector_edid(connector))) {
struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
struct radeon_connector_atom_dig *dig_connector;