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drbd: convert to idr_alloc()

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Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
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 17:04:01 -08:00 committed by Linus Torvalds
parent b051f6edc2
commit 56de210245
1 changed files with 14 additions and 17 deletions
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31
drivers/block/drbd/drbd_main.c
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@ -2660,25 +2660,24 @@ enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor,
mdev->read_requests = RB_ROOT;
mdev->write_requests = RB_ROOT;
if (!idr_pre_get(&minors, GFP_KERNEL))
minor_got = idr_alloc(&minors, mdev, minor, minor + 1, GFP_KERNEL);
if (minor_got < 0) {
if (minor_got == -ENOSPC) {
err = ERR_MINOR_EXISTS;
drbd_msg_put_info("requested minor exists already");
}
goto out_no_minor_idr;
if (idr_get_new_above(&minors, mdev, minor, &minor_got))
goto out_no_minor_idr;
if (minor_got != minor) {
err = ERR_MINOR_EXISTS;
drbd_msg_put_info("requested minor exists already");
}
vnr_got = idr_alloc(&tconn->volumes, mdev, vnr, vnr + 1, GFP_KERNEL);
if (vnr_got < 0) {
if (vnr_got == -ENOSPC) {
err = ERR_INVALID_REQUEST;
drbd_msg_put_info("requested volume exists already");
}
goto out_idr_remove_minor;
}
if (!idr_pre_get(&tconn->volumes, GFP_KERNEL))
goto out_idr_remove_minor;
if (idr_get_new_above(&tconn->volumes, mdev, vnr, &vnr_got))
goto out_idr_remove_minor;
if (vnr_got != vnr) {
err = ERR_INVALID_REQUEST;
drbd_msg_put_info("requested volume exists already");
goto out_idr_remove_vol;
}
add_disk(disk);
kref_init(&mdev->kref); /* one ref for both idrs and the the add_disk */
@ -2689,8 +2688,6 @@ enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor,
return NO_ERROR;
out_idr_remove_vol:
idr_remove(&tconn->volumes, vnr_got);
out_idr_remove_minor:
idr_remove(&minors, minor_got);
synchronize_rcu();