sh_eth: check TSU registers ioremap() error

One must check the result of ioremap() -- in this case it prevents potential kernel oops when initializing TSU registers further on... Signed-off-by: Sergei Shtylyov <[email protected]> Signed-off-by: David S. Miller <[email protected]>
kishon · Mar 20, 2013 · fc0c090 · fc0c090
1 parent 0582b7d
commit fc0c090
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
@@ -2446,6 +2446,11 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
 		}
 		mdp->tsu_addr = ioremap(rtsu->start,
 					resource_size(rtsu));
+		if (mdp->tsu_addr == NULL) {
+			ret = -ENOMEM;
+			dev_err(&pdev->dev, "TSU ioremap failed.\n");
+			goto out_release;
+		}
 		mdp->port = devno % 2;
 		ndev->features = NETIF_F_HW_VLAN_FILTER;
 	}