ceph: checking for IS_ERR instead of NULL

ceph_osdc_alloc_request() returns NULL on error, it never returns error
pointers.

Fixes: 5be0389dac66 ('ceph: re-send AIO write request when getting -EOLDSNAP error')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 86a9c38..7c85dde 100644 (file)
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -698,8 +698,8 @@ static void ceph_aio_retry_work(struct work_struct *work)
 
        req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 2,
                        false, GFP_NOFS);
-       if (IS_ERR(req)) {
-               ret = PTR_ERR(req);
+       if (!req) {
+               ret = -ENOMEM;
                req = orig_req;
                goto out;
        }