[PATCH v4 11/21] afs: Fix misplaced inc of net->cells_outstanding

[David Howells <dhowells@redhat.com>]

Fix net->cells_outstanding being incremented before the check for failure
of idr_alloc_cyclic(), leaving the count incremented on error.

Fixes: 88c853c3f5c0 ("afs: Fix cell refcounting by splitting the usage counter")
Reported-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
---
 fs/afs/cell.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/cell.c b/fs/afs/cell.c
index 9738684dbdd2..e0fab1609f27 100644
--- a/fs/afs/cell.c
+++ b/fs/afs/cell.c
@@ -205,11 +205,11 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net,
 	cell->dns_source = vllist->source;
 	cell->dns_status = vllist->status;
 	smp_store_release(&cell->dns_lookup_count, 1); /* vs source/status */
-	atomic_inc(&net->cells_outstanding);
 	ret = idr_alloc_cyclic(&net->cells_dyn_ino, cell,
 			       2, INT_MAX / 2, GFP_KERNEL);
 	if (ret < 0)
 		goto error;
+	atomic_inc(&net->cells_outstanding);
 	cell->dynroot_ino = ret;
 	cell->debug_id = atomic_inc_return(&cell_debug_id);