diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-08-15 02:02:44 +0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2013-08-21 06:58:01 +0400 |
| commit | cd4f013f3a4b6a55d484cc2e206dc08e055e5291 (patch) | |
| tree | 1af8117ef7955b830c9af6a54a9cafe24943641d /drivers/gpu/drm/drm_gem.c | |
| parent | 84341c280acb8217a301344082c7ad8b9af870a6 (diff) | |
| download | linux-cd4f013f3a4b6a55d484cc2e206dc08e055e5291.tar.xz | |
drm/gem: switch dev->object_name_lock to a mutex
I want to wrap the creation of a dma-buf from a gem object in it,
so that the obj->export_dma_buf cache can be atomically filled in.
Instead of creating a new mutex just for that variable I've figured
I can reuse the existing dev->object_name_lock, especially since
the new semantics will exactly mirror the flink obj->name already
protected by that lock.
v2: idr_preload/idr_preload_end is now an atomic section, so need to
move the mutex locking outside.
[airlied: fix up conflict with patch to make debugfs use lock]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_gem.c')
| -rw-r--r-- | drivers/gpu/drm/drm_gem.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 52548fd34b15..adb9eda4fa1a 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -93,7 +93,7 @@ drm_gem_init(struct drm_device *dev) { struct drm_gem_mm *mm; - spin_lock_init(&dev->object_name_lock); + mutex_init(&dev->object_name_lock); idr_init(&dev->object_name_idr); mm = kzalloc(sizeof(struct drm_gem_mm), GFP_KERNEL); @@ -243,10 +243,10 @@ drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj) * checked for a name */ - spin_lock(&obj->dev->object_name_lock); + mutex_lock(&obj->dev->object_name_lock); if (--obj->handle_count == 0) drm_gem_object_handle_free(obj); - spin_unlock(&obj->dev->object_name_lock); + mutex_unlock(&obj->dev->object_name_lock); drm_gem_object_unreference_unlocked(obj); } @@ -324,16 +324,16 @@ drm_gem_handle_create(struct drm_file *file_priv, * Get the user-visible handle using idr. Preload and perform * allocation under our spinlock. */ + mutex_lock(&dev->object_name_lock); idr_preload(GFP_KERNEL); - spin_lock(&dev->object_name_lock); spin_lock(&file_priv->table_lock); ret = idr_alloc(&file_priv->object_idr, obj, 1, 0, GFP_NOWAIT); drm_gem_object_reference(obj); obj->handle_count++; spin_unlock(&file_priv->table_lock); - spin_unlock(&dev->object_name_lock); idr_preload_end(); + mutex_unlock(&dev->object_name_lock); if (ret < 0) { drm_gem_object_handle_unreference_unlocked(obj); return ret; @@ -578,8 +578,8 @@ drm_gem_flink_ioctl(struct drm_device *dev, void *data, if (obj == NULL) return -ENOENT; + mutex_lock(&dev->object_name_lock); idr_preload(GFP_KERNEL); - spin_lock(&dev->object_name_lock); /* prevent races with concurrent gem_close. */ if (obj->handle_count == 0) { ret = -ENOENT; @@ -601,8 +601,8 @@ drm_gem_flink_ioctl(struct drm_device *dev, void *data, ret = 0; err: - spin_unlock(&dev->object_name_lock); idr_preload_end(); + mutex_unlock(&dev->object_name_lock); drm_gem_object_unreference_unlocked(obj); return ret; } @@ -625,11 +625,11 @@ drm_gem_open_ioctl(struct drm_device *dev, void *data, if (!(dev->driver->driver_features & DRIVER_GEM)) return -ENODEV; - spin_lock(&dev->object_name_lock); + mutex_lock(&dev->object_name_lock); obj = idr_find(&dev->object_name_idr, (int) args->name); if (obj) drm_gem_object_reference(obj); - spin_unlock(&dev->object_name_lock); + mutex_unlock(&dev->object_name_lock); if (!obj) return -ENOENT; |