irda-usb: add error handling and fix leak

If the call to kcalloc() fails then we should return -ENOMEM.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/irda-usb.c

@@ -1651,6 +1651,8 @@ static int irda_usb_probe(struct usb_interface *intf,
 
 	self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
 				GFP_KERNEL);
+	if (!self->rx_urb)
+		goto err_free_net;
 
 	for (i = 0; i < self->max_rx_urb; i++) {
 		self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
@@ -1783,6 +1785,8 @@ err_out_2:
 err_out_1:
 	for (i = 0; i < self->max_rx_urb; i++)
 		usb_free_urb(self->rx_urb[i]);
+	kfree(self->rx_urb);
+err_free_net:
 	free_netdev(net);
 err_out:
 	return ret;