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rbd: move ctl_mutex lock inside rbd_client_create()

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Since rbd_client_create() is only called in one place, move the
acquisition of the mutex around that call inside that function.

Signed-off-by: Alex Elder <elder@dreamhost.com>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Alex Elder 2012-01-29 13:57:44 -06:00
parent d97081b0c7
commit bc534d86be
1 changed files with 7 additions and 4 deletions
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11
drivers/block/rbd.c
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@ -257,9 +257,11 @@ static struct rbd_client *rbd_client_create(struct ceph_options *opt,
kref_init(&rbdc->kref);
INIT_LIST_HEAD(&rbdc->node);
mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING);
rbdc->client = ceph_create_client(opt, rbdc, 0, 0);
if (IS_ERR(rbdc->client))
goto out_rbdc;
goto out_mutex;
opt = NULL; /* Now rbdc->client is responsible for opt */
ret = ceph_open_session(rbdc->client);
@ -272,12 +274,15 @@ static struct rbd_client *rbd_client_create(struct ceph_options *opt,
list_add_tail(&rbdc->node, &rbd_client_list);
spin_unlock(&node_lock);
mutex_unlock(&ctl_mutex);
dout("rbd_client_create created %p\n", rbdc);
return rbdc;
out_err:
ceph_destroy_client(rbdc->client);
out_rbdc:
out_mutex:
mutex_unlock(&ctl_mutex);
kfree(rbdc);
out_opt:
if (opt)
@ -396,9 +401,7 @@ static int rbd_get_client(struct rbd_device *rbd_dev, const char *mon_addr,
}
spin_unlock(&node_lock);
mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING);
rbdc = rbd_client_create(opt, rbd_opts);
mutex_unlock(&ctl_mutex);
if (IS_ERR(rbdc)) {
ret = PTR_ERR(rbdc);