rndis_host: Halt device if rndis_bind fails.

When bind fails after device was initialized, shutdown device properly
by sending RNDIS_MSG_HALT.
Signed-off-by: NJussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: NBjorge Dijkstra <bjd@jooz.net>
Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/rndis_host.c

@@ -467,6 +467,7 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 		struct rndis_query_c	*get_c;
 		struct rndis_set	*set;
 		struct rndis_set_c	*set_c;
+		struct rndis_halt	*halt;
 	} u;
 	u32			tmp;
 	int			reply_len;
@@ -517,7 +518,7 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 				"dev can't take %u byte packets (max %u)\n",
 				dev->hard_mtu, tmp);
 			retval = -EINVAL;
-			goto fail_and_release;
+			goto halt_fail_and_release;
 		}
 		dev->hard_mtu = tmp;
 		net->mtu = dev->hard_mtu - net->hard_header_len;
@@ -539,7 +540,7 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 			48, (void **) &bp, &reply_len);
 	if (unlikely(retval< 0)) {
 		dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
-		goto fail_and_release;
+		goto halt_fail_and_release;
 	}
 	memcpy(net->dev_addr, bp, ETH_ALEN);
 
@@ -555,7 +556,7 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 	retval = rndis_command(dev, u.header);
 	if (unlikely(retval < 0)) {
 		dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
-		goto fail_and_release;
+		goto halt_fail_and_release;
 	}
 
 	retval = 0;
@@ -563,6 +564,11 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
 	kfree(u.buf);
 	return retval;
 
+halt_fail_and_release:
+	memset(u.halt, 0, sizeof *u.halt);
+	u.halt->msg_type = RNDIS_MSG_HALT;
+	u.halt->msg_len = ccpu2(sizeof *u.halt);
+	(void) rndis_command(dev, (void *)u.halt);
 fail_and_release:
 	usb_set_intfdata(info->data, NULL);
 	usb_driver_release_interface(driver_of(intf), info->data);