From: Jack Wang <jinpu.wang@ionos.com>
Date: Thu, 25 Aug 2022 08:35:33 +0200
Subject: net/mlx4: Fix error check for dma_map_sg
Patch-mainline: v6.1-rc1
Git-commit: 0c1f77d87d699346f8e8a4874692eb82cbcf9c65
References: jsc#PED-1548

dma_map_sg return 0 on error.

Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20220825063533.21015-1-jinpu.wang@ionos.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx4/icm.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx4/icm.c
+++ b/drivers/net/ethernet/mellanox/mlx4/icm.c
@@ -208,7 +208,7 @@ struct mlx4_icm *mlx4_alloc_icm(struct m
 						chunk->sg, chunk->npages,
 						DMA_BIDIRECTIONAL);
 
-			if (chunk->nsg <= 0)
+			if (!chunk->nsg)
 				goto fail;
 		}
 
@@ -222,7 +222,7 @@ struct mlx4_icm *mlx4_alloc_icm(struct m
 		chunk->nsg = dma_map_sg(&dev->persist->pdev->dev, chunk->sg,
 					chunk->npages, DMA_BIDIRECTIONAL);
 
-		if (chunk->nsg <= 0)
+		if (!chunk->nsg)
 			goto fail;
 	}