bnx2: Close device if MTU change or ring size change fails.

When unable to allocate memory for new MTU or new ring size, we need
to close the device to prevent it from crashing.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2.c

@@ -6992,9 +6992,14 @@ bnx2_change_ring_size(struct bnx2 *bp, u32 rx, u32 tx)
 		int rc;
 
 		rc = bnx2_alloc_mem(bp);
-		if (rc)
+		if (!rc)
+			rc = bnx2_init_nic(bp, 0);
+
+		if (rc) {
+			bnx2_napi_enable(bp);
+			dev_close(bp->dev);
 			return rc;
-		bnx2_init_nic(bp, 0);
+		}
 		bnx2_netif_start(bp);
 	}
 	return 0;