xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/nouveau: Use drm_connector_list_iter_* for iterating connectors

Browse Source 
Every codepath in nouveau that loops through the connector list
currently does so using the old method, which is prone to race
conditions from MST connectors being created and destroyed. This has
been causing a multitude of problems, including memory corruption from
trying to access connectors that have already been freed!

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Cc: Karol Herbst <karolherbst@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Lyude Paul
2018-07-13 13:06:32 -04:00
committed by Ben Skeggs
parent 7f073d011f
commit 22b76bbe08
4 changed files with 29 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/nouveau/nouveau_backlight.c
View File

@@ -267,6 +267,7 @@ nouveau_backlight_init(struct drm_device *dev)
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvif_device *device = &drm->client.device;
struct drm_connector *connector;
struct drm_connector_list_iter conn_iter;
INIT_LIST_HEAD(&drm->bl_connectors);
@@ -275,7 +276,8 @@ nouveau_backlight_init(struct drm_device *dev)
return 0;
}
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
drm_connector_list_iter_begin(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
connector->connector_type != DRM_MODE_CONNECTOR_eDP)
continue;
@@ -292,7 +294,7 @@ nouveau_backlight_init(struct drm_device *dev)
break;
}
}
drm_connector_list_iter_end(&conn_iter);
return 0;
}