[PATCH net-next] net: bcmgenet: return NULL instead of plain integer

[Wei Yongjun]

Fixes the following sparse warning:

drivers/net/ethernet/broadcom/genet/bcmgenet.c:1351:16: warning:
 Using plain integer as NULL pointer

Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c 
b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 7db8edc..2f4cb5c 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1348,7 +1348,7 @@ static struct sk_buff *bcmgenet_free_tx_cb(struct device 
*dev,
                dma_unmap_addr_set(cb, dma_addr, 0);
        }
 
-       return 0;
+       return NULL;
 }
 
 /* Simple helper to free a receive control block's resources */