From: Leon Romanovsky <leonro@mellanox.com>
Date: Sun, 24 Jun 2018 11:23:48 +0300
Subject: RDMA/umem: Don't check for a negative return value of
 dma_map_sg_attrs()
Patch-mainline: v4.19-rc1
Git-commit: 3a2e791c9456aab38a727b2b2558c08210f59f03
References: bsc#1103992 FATE#326009

dma_map_sg_attrs() returns 0 on error and can't return a negative number
(ensured by BUG_ON), so don't check.

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/core/umem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/core/umem.c
+++ b/drivers/infiniband/core/umem.c
@@ -206,7 +206,7 @@ struct ib_umem *ib_umem_get(struct ib_uc
 				  DMA_BIDIRECTIONAL,
 				  dma_attrs);
 
-	if (umem->nmap <= 0) {
+	if (!umem->nmap) {
 		ret = -ENOMEM;
 		goto out;
 	}