amd-xgbe: use dma_mapping_error to check map errors

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 <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files 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 @@ again:
         /* 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;