rbd: null vs ERR_PTR

ceph_alloc_page_vector() returns ERR_PTR(-ENOMEM) on errors.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 1ac87f182057864664d662e866efb0cac47f8bf3..52f9420704c7d6fd12f200e2e9525167d74902db 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -826,8 +826,8 @@ static int rbd_req_sync_op(struct rbd_device *dev,
 
        num_pages = calc_pages_for(ofs , len);
        pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
-       if (!pages)
-               return -ENOMEM;
+       if (IS_ERR(pages))
+               return PTR_ERR(pages);
 
        if (!orig_ops) {
                payload_len = (flags & CEPH_OSD_FLAG_WRITE ? len : 0);