Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Couple conflicts resolved here:

1) In the MACB driver, a bug fix to properly initialize the
   RX tail pointer properly overlapped with some changes
   to support variable sized rings.

2) In XGBE we had a "CONFIG_PM" --> "CONFIG_PM_SLEEP" fix
   overlapping with a reorganization of the driver to support
   ACPI, OF, as well as PCI variants of the chip.

3) In 'net' we had several probe error path bug fixes to the
   stmmac driver, meanwhile a lot of this code was cleaned up
   and reorganized in 'net-next'.

4) The cls_flower classifier obtained a helper function in
   'net-next' called __fl_delete() and this overlapped with
   Daniel Borkamann's bug fix to use RCU for object destruction
   in 'net'.  It also overlapped with Jiri's change to guard
   the rhashtable_remove_fast() call with a check against
   tc_skip_sw().

5) In mlx4, a revert bug fix in 'net' overlapped with some
   unrelated changes in 'net-next'.

6) In geneve, a stale header pointer after pskb_expand_head()
   bug fix in 'net' overlapped with a large reorganization of
   the same code in 'net-next'.  Since the 'net-next' code no
   longer had the bug in question, there was nothing to do
   other than to simply take the 'net-next' hunks.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 31 insertions, 7 deletions

diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 45e5e4332a28..fe7b2886cb6b 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -388,12 +388,6 @@ void usbnet_cdc_status(struct usbnet *dev, struct urb *urb)
 	case USB_CDC_NOTIFY_NETWORK_CONNECTION:
 		netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
 			  event->wValue ? "on" : "off");
-
-		/* Work-around for devices with broken off-notifications */
-		if (event->wValue &&
-		    !test_bit(__LINK_STATE_NOCARRIER, &dev->net->state))
-			usbnet_link_change(dev, 0, 0);
-
 		usbnet_link_change(dev, !!event->wValue, 0);
 		break;
 	case USB_CDC_NOTIFY_SPEED_CHANGE:	/* tx/rx rates */
@@ -466,6 +460,36 @@ static int usbnet_cdc_zte_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 	return 1;
 }
 
+/* Ensure correct link state
+ *
+ * Some devices (ZTE MF823/831/910) export two carrier on notifications when
+ * connected. This causes the link state to be incorrect. Work around this by
+ * always setting the state to off, then on.
+ */
+void usbnet_cdc_zte_status(struct usbnet *dev, struct urb *urb)
+{
+	struct usb_cdc_notification *event;
+
+	if (urb->actual_length < sizeof(*event))
+		return;
+
+	event = urb->transfer_buffer;
+
+	if (event->bNotificationType != USB_CDC_NOTIFY_NETWORK_CONNECTION) {
+		usbnet_cdc_status(dev, urb);
+		return;
+	}
+
+	netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n",
+		  event->wValue ? "on" : "off");
+
+	if (event->wValue &&
+	    netif_carrier_ok(dev->net))
+		netif_carrier_off(dev->net);
+
+	usbnet_link_change(dev, !!event->wValue, 0);
+}
+
 static const struct driver_info	cdc_info = {
 	.description =	"CDC Ethernet Device",
 	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT,
@@ -481,7 +505,7 @@ static const struct driver_info	zte_cdc_info = {
 	.flags =	FLAG_ETHER | FLAG_POINTTOPOINT,
 	.bind =		usbnet_cdc_zte_bind,
 	.unbind =	usbnet_cdc_unbind,
-	.status =	usbnet_cdc_status,
+	.status =	usbnet_cdc_zte_status,
 	.set_rx_mode =	usbnet_cdc_update_filter,
 	.manage_power =	usbnet_manage_power,
 	.rx_fixup = usbnet_cdc_zte_rx_fixup,