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drm: convert to idr_alloc()

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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
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17
drivers/gpu/drm/drm_context.c
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@@ -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;
}
/**