diff options
| author | Tejun Heo <tj@kernel.org> | 2013-02-27 17:04:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-27 19:10:19 -0800 |
| commit | 6d770931291eec7e7be774a5272db28d29899a66 (patch) | |
| tree | 42e2d59915de9875caf17b7548098f1c07c99225 /drivers/uio/uio.c | |
| parent | 6deb69facebb2f9a2b15a8e5e33ab00ebc7c44cb (diff) | |
| download | lwn-6d770931291eec7e7be774a5272db28d29899a66.tar.gz lwn-6d770931291eec7e7be774a5272db28d29899a66.zip | |
uio: convert to idr_alloc()
Convert to the much saner new idr interface.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/uio/uio.c')
| -rw-r--r-- | drivers/uio/uio.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 5110f367f1f1..c8b926291e28 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -369,26 +369,15 @@ static void uio_dev_del_attributes(struct uio_device *idev) static int uio_get_minor(struct uio_device *idev) { int retval = -ENOMEM; - int id; mutex_lock(&minor_lock); - if (idr_pre_get(&uio_idr, GFP_KERNEL) == 0) - goto exit; - - retval = idr_get_new(&uio_idr, idev, &id); - if (retval < 0) { - if (retval == -EAGAIN) - retval = -ENOMEM; - goto exit; - } - if (id < UIO_MAX_DEVICES) { - idev->minor = id; - } else { + retval = idr_alloc(&uio_idr, idev, 0, UIO_MAX_DEVICES, GFP_KERNEL); + if (retval >= 0) { + idev->minor = retval; + } else if (retval == -ENOSPC) { dev_err(idev->dev, "too many uio devices\n"); retval = -EINVAL; - idr_remove(&uio_idr, id); } -exit: mutex_unlock(&minor_lock); return retval; } |