From: Leon Romanovsky <leonro@mellanox.com>
Date: Thu, 29 Nov 2018 12:25:29 +0200
Subject: RDMA/mlx5: Initialize return variable in case pagefault was skipped
Patch-mainline: v4.20-rc5
Git-commit: 7bca603a69c0c239654a8f0bcb99e1a60b30040c
References: bsc#1103991 FATE#326007

Pagefaults occurred in non-ODP MR are completely valid events, so
initialize return variable to 0.

Fixes: 4d5422a309de ("IB/mlx5: Skip non-ODP MR when handling a page fault")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/mlx5/odp.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -679,6 +679,7 @@ next_mr:
 				    key);
 			if (bytes_mapped)
 				*bytes_mapped += bcnt;
+			ret = 0;
 			goto srcu_unlock;
 		}