diff options
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 14 | ||||
| -rw-r--r-- | include/drm/drm_crtc.h | 3 |
2 files changed, 11 insertions, 6 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 5b2cbb778162..bfce0992fefb 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -194,7 +194,6 @@ char *drm_get_connector_status_name(enum drm_connector_status status) * @type: object type * * LOCKING: - * Caller must hold DRM mode_config lock. * * Create a unique identifier based on @ptr in @dev's identifier space. Used * for tracking modes, CRTCs and connectors. @@ -209,15 +208,15 @@ static int drm_mode_object_get(struct drm_device *dev, int new_id = 0; int ret; - WARN(!mutex_is_locked(&dev->mode_config.mutex), - "%s called w/o mode_config lock\n", __func__); again: if (idr_pre_get(&dev->mode_config.crtc_idr, GFP_KERNEL) == 0) { DRM_ERROR("Ran out memory getting a mode number\n"); return -EINVAL; } + mutex_lock(&dev->mode_config.idr_mutex); ret = idr_get_new_above(&dev->mode_config.crtc_idr, obj, 1, &new_id); + mutex_unlock(&dev->mode_config.idr_mutex); if (ret == -EAGAIN) goto again; @@ -239,16 +238,20 @@ again: static void drm_mode_object_put(struct drm_device *dev, struct drm_mode_object *object) { + mutex_lock(&dev->mode_config.idr_mutex); idr_remove(&dev->mode_config.crtc_idr, object->id); + mutex_unlock(&dev->mode_config.idr_mutex); } void *drm_mode_object_find(struct drm_device *dev, uint32_t id, uint32_t type) { - struct drm_mode_object *obj; + struct drm_mode_object *obj = NULL; + mutex_lock(&dev->mode_config.idr_mutex); obj = idr_find(&dev->mode_config.crtc_idr, id); if (!obj || (obj->type != type) || (obj->id != id)) - return NULL; + obj = NULL; + mutex_unlock(&dev->mode_config.idr_mutex); return obj; } @@ -786,6 +789,7 @@ EXPORT_SYMBOL(drm_mode_create_dithering_property); void drm_mode_config_init(struct drm_device *dev) { mutex_init(&dev->mode_config.mutex); + mutex_init(&dev->mode_config.idr_mutex); INIT_LIST_HEAD(&dev->mode_config.fb_list); INIT_LIST_HEAD(&dev->mode_config.fb_kernel_list); INIT_LIST_HEAD(&dev->mode_config.crtc_list); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 47809ac94bc3..d54de24bf371 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -528,7 +528,8 @@ struct drm_mode_group { * */ struct drm_mode_config { - struct mutex mutex; /* protects configuration and IDR */ + struct mutex mutex; /* protects configuration (mode lists etc.) */ + struct mutex idr_mutex; /* for IDR management */ struct idr crtc_idr; /* use this idr for all IDs, fb, crtc, connector, modes - just makes life easier */ /* this is limited to one for now */ int num_fb; |
