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monitor-manager-kms: Cope with non-existent connectors and encoders

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DRM objects like connectors and encoders might change at any time, in
particular they might become invalid between drmModeGetResources() and
getting the actual objects in which case they'll be NULL. Be defensive
against that.

Note that, if this happens, we should get another udev event soon
which will cause us to update our state.

https://bugzilla.gnome.org/show_bug.cgi?id=745476
This commit is contained in:
Rui Matos 2015-03-02 17:38:41 +01:00
parent 6af48d75a4
commit db9645fcb3
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/backends/native/meta-monitor-manager-kms.c
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@ -366,7 +366,7 @@ meta_monitor_manager_kms_read_current (MetaMonitorManager *manager)
connector = drmModeGetConnector (manager_kms->fd, resources->connectors[i]);
manager_kms->connectors[i] = connector;
if (connector->connection == DRM_MODE_CONNECTED)
if (connector && connector->connection == DRM_MODE_CONNECTED)
{
/* Collect all modes for this connector */
for (j = 0; j < (unsigned)connector->count_modes; j++)
@ -460,7 +460,7 @@ meta_monitor_manager_kms_read_current (MetaMonitorManager *manager)
connector = manager_kms->connectors[i];
meta_output = &manager->outputs[n_actual_outputs];
if (connector->connection == DRM_MODE_CONNECTED)
if (connector && connector->connection == DRM_MODE_CONNECTED)
{
meta_output->driver_private = output_kms = g_slice_new0 (MetaOutputKms);
meta_output->driver_notify = (GDestroyNotify)meta_output_destroy_notify;
@ -509,6 +509,8 @@ meta_monitor_manager_kms_read_current (MetaMonitorManager *manager)
for (j = 0; j < output_kms->n_encoders; j++)
{
output_kms->encoders[j] = drmModeGetEncoder (manager_kms->fd, connector->encoders[j]);
if (!output_kms->encoders[j])
continue;
/* We only list CRTCs as supported if they are supported by all encoders
for this connectors.
@ -616,7 +618,8 @@ meta_monitor_manager_kms_read_current (MetaMonitorManager *manager)
{
for (k = 0; k < (unsigned)resources->count_encoders; k++)
{
if (output_kms->encoders[j]->encoder_id == encoders[k]->encoder_id)
if (output_kms->encoders[j] && encoders[k] &&
output_kms->encoders[j]->encoder_id == encoders[k]->encoder_id)
{
output_kms->encoder_mask |= (1 << k);
break;