[PATCH AUTOSEL 4.18 12/88] amd-xgbe: use dma_mapping_error to check map errors

[Sasha Levin]

From: YueHaibing <yuehaib...@huawei.com>

[ Upstream commit b24dbfe9ce03d9f83306616f22fb0e04e8960abe ]

The dma_mapping_error() returns true or false, but we want
to return -ENOMEM if there was an error.

Fixes: 174fd2597b0b ("amd-xgbe: Implement split header receive support")
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 drivers/net/ethernet/amd/xgbe/xgbe-desc.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-desc.c 
b/drivers/net/ethernet/amd/xgbe/xgbe-desc.c
index cc1e4f820e64..533094233659 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-desc.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-desc.c
@@ -289,7 +289,7 @@ static int xgbe_alloc_pages(struct xgbe_prv_data *pdata,
        struct page *pages = NULL;
        dma_addr_t pages_dma;
        gfp_t gfp;
-       int order, ret;
+       int order;
 
 again:
        order = alloc_order;
@@ -316,10 +316,9 @@ static int xgbe_alloc_pages(struct xgbe_prv_data *pdata,
        /* Map the pages */
        pages_dma = dma_map_page(pdata->dev, pages, 0,
                                 PAGE_SIZE << order, DMA_FROM_DEVICE);
-       ret = dma_mapping_error(pdata->dev, pages_dma);
-       if (ret) {
+       if (dma_mapping_error(pdata->dev, pages_dma)) {
                put_page(pages);
-               return ret;
+               return -ENOMEM;
        }
 
        pa->pages = pages;
-- 
2.17.1