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authorTejun Heo <tj@kernel.org>2013-02-27 17:04:08 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-27 19:10:15 -0800
commit2e928815c1886fe628ed54623aa98d0889cf5509 (patch)
tree50327f66bfd641e3c809db6c69af59956c8554df
parent62f516b8d6b0610c257b4f92264e00a8dee77a0b (diff)
downloadlinux-2e928815c1886fe628ed54623aa98d0889cf5509.tar.bz2
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>
-rw-r--r--drivers/gpu/drm/drm_context.c17
-rw-r--r--drivers/gpu/drm/drm_crtc.c19
-rw-r--r--drivers/gpu/drm/drm_gem.c38
-rw-r--r--drivers/gpu/drm/drm_stub.c19
4 files changed, 25 insertions, 68 deletions
diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
index 75f62c5e2a6b..725968d38976 100644
--- a/drivers/gpu/drm/drm_context.c
+++ b/drivers/gpu/drm/drm_context.c
@@ -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;
}
/**
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 99928b933b16..792c3e3795ca 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -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;
}
/**
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index e775859f0a83..af779ae19ebf 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -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;
}
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 200e104f1fa0..7d30802a018f 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -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)