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drm: convert to idr_alloc() 

Convert to the much saner new idr interface.

* drm_ctxbitmap_next() error handling in drm_addctx() seems broken.
  drm_ctxbitmap_next() return -errno on failure not -1.

[artem.savkov@gmail.com: missing idr_preload_end in drm_gem_flink_ioctl]
[jslaby@suse.cz: fix drm_gem_flink_ioctl() return value]
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David Airlie <airlied@linux.ie>
Signed-off-by: Artem Savkov <artem.savkov@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tejun Heo 2013-02-27 17:04:08 -08:00 committed by Linus Torvalds
parent 62f516b8d6
commit 2e928815c1
4 changed files with 25 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/gpu/drm/drm_context.c
View File

@ -74,24 +74,13 @@ void drm_ctxbitmap_free(struct drm_device * dev, int ctx_handle)
*/
static int drm_ctxbitmap_next(struct drm_device * dev)
{
int new_id;
int ret;
again:
if (idr_pre_get(&dev->ctx_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Out of memory expanding drawable idr\n");
return -ENOMEM;
}
mutex_lock(&dev->struct_mutex);
ret = idr_get_new_above(&dev->ctx_idr, NULL,
DRM_RESERVED_CONTEXTS, &new_id);
ret = idr_alloc(&dev->ctx_idr, NULL, DRM_RESERVED_CONTEXTS, 0,
GFP_KERNEL);
mutex_unlock(&dev->struct_mutex);
if (ret == -EAGAIN)
goto again;
else if (ret)
return ret;
return new_id;
return ret;
}
/**

19
drivers/gpu/drm/drm_crtc.c
View File

@ -266,32 +266,21 @@ char *drm_get_connector_status_name(enum drm_connector_status status)
static int drm_mode_object_get(struct drm_device *dev,
struct drm_mode_object *obj, uint32_t obj_type)
{
int new_id = 0;
int ret;
again:
if (idr_pre_get(&dev->mode_config.crtc_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Ran out memory getting a mode number\n");
return -ENOMEM;
}
mutex_lock(&dev->mode_config.idr_mutex);
ret = idr_get_new_above(&dev->mode_config.crtc_idr, obj, 1, &new_id);
if (!ret) {
ret = idr_alloc(&dev->mode_config.crtc_idr, obj, 1, 0, GFP_KERNEL);
if (ret >= 0) {
/*
* Set up the object linking under the protection of the idr
* lock so that other users can't see inconsistent state.
*/
obj->id = new_id;
obj->id = ret;
obj->type = obj_type;
}
mutex_unlock(&dev->mode_config.idr_mutex);
if (ret == -EAGAIN)
goto again;
return ret;
return ret < 0 ? ret : 0;
}
/**

38
drivers/gpu/drm/drm_gem.c
View File

@ -270,21 +270,19 @@ drm_gem_handle_create(struct drm_file *file_priv,
int ret;
/*
* Get the user-visible handle using idr.
* Get the user-visible handle using idr. Preload and perform
* allocation under our spinlock.
*/
again:
/* ensure there is space available to allocate a handle */
if (idr_pre_get(&file_priv->object_idr, GFP_KERNEL) == 0)
return -ENOMEM;
/* do the allocation under our spinlock */
idr_preload(GFP_KERNEL);
spin_lock(&file_priv->table_lock);
ret = idr_get_new_above(&file_priv->object_idr, obj, 1, (int *)handlep);
ret = idr_alloc(&file_priv->object_idr, obj, 1, 0, GFP_NOWAIT);
spin_unlock(&file_priv->table_lock);
if (ret == -EAGAIN)
goto again;
else if (ret)
idr_preload_end();
if (ret < 0)
return ret;
*handlep = ret;
drm_gem_object_handle_reference(obj);
@ -451,29 +449,25 @@ drm_gem_flink_ioctl(struct drm_device *dev, void *data,
if (obj == NULL)
return -ENOENT;
again:
if (idr_pre_get(&dev->object_name_idr, GFP_KERNEL) == 0) {
ret = -ENOMEM;
goto err;
}
idr_preload(GFP_KERNEL);
spin_lock(&dev->object_name_lock);
if (!obj->name) {
ret = idr_get_new_above(&dev->object_name_idr, obj, 1,
&obj->name);
ret = idr_alloc(&dev->object_name_idr, obj, 1, 0, GFP_NOWAIT);
obj->name = ret;
args->name = (uint64_t) obj->name;
spin_unlock(&dev->object_name_lock);
idr_preload_end();
if (ret == -EAGAIN)
goto again;
else if (ret)
if (ret < 0)
goto err;
ret = 0;
/* Allocate a reference for the name table. */
drm_gem_object_reference(obj);
} else {
args->name = (uint64_t) obj->name;
spin_unlock(&dev->object_name_lock);
idr_preload_end();
ret = 0;
}

19
drivers/gpu/drm/drm_stub.c
View File

@ -109,7 +109,6 @@ EXPORT_SYMBOL(drm_ut_debug_printk);
static int drm_minor_get_id(struct drm_device *dev, int type)
{
int new_id;
int ret;
int base = 0, limit = 63;
@ -121,25 +120,11 @@ static int drm_minor_get_id(struct drm_device *dev, int type)
limit = base + 255;
}
again:
if (idr_pre_get(&drm_minors_idr, GFP_KERNEL) == 0) {
DRM_ERROR("Out of memory expanding drawable idr\n");
return -ENOMEM;
}
mutex_lock(&dev->struct_mutex);
ret = idr_get_new_above(&drm_minors_idr, NULL,
base, &new_id);
ret = idr_alloc(&drm_minors_idr, NULL, base, limit, GFP_KERNEL);
mutex_unlock(&dev->struct_mutex);
if (ret == -EAGAIN)
goto again;
else if (ret)
return ret;
if (new_id >= limit) {
idr_remove(&drm_minors_idr, new_id);
return -EINVAL;
}
return new_id;
return ret == -ENOSPC ? -EINVAL : ret;
}
struct drm_master *drm_master_create(struct drm_minor *minor)