Commit 6d770931 authored by Tejun Heo's avatar Tejun Heo Committed by Linus Torvalds

uio: convert to idr_alloc()

Convert to the much saner new idr interface.
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6deb69fa
......@@ -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;
}
......
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