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vfio: convert to idr_alloc() 

Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
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 17:04:48 -08:00 committed by Linus Torvalds
parent 6d77093129
commit a1c36b166b
1 changed files with 1 additions and 16 deletions
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17
drivers/vfio/vfio.c
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@ -139,23 +139,8 @@ EXPORT_SYMBOL_GPL(vfio_unregister_iommu_driver);
*/
static int vfio_alloc_group_minor(struct vfio_group *group)
{
int ret, minor;
again:
if (unlikely(idr_pre_get(&vfio.group_idr, GFP_KERNEL) == 0))
return -ENOMEM;
/* index 0 is used by /dev/vfio/vfio */
ret = idr_get_new_above(&vfio.group_idr, group, 1, &minor);
if (ret == -EAGAIN)
goto again;
if (ret || minor > MINORMASK) {
if (minor > MINORMASK)
idr_remove(&vfio.group_idr, minor);
return -ENOSPC;
}
return minor;
return idr_alloc(&vfio.group_idr, group, 1, MINORMASK + 1, GFP_KERNEL);
}
static void vfio_free_group_minor(int minor)