cdc-ether: extract usbnet_cdc_update_filter function

This will be used by the set_rx_mode callback.

Also move a comment about multicast filtering in this new function.

Signed-off-by: Olivier Blin <olivier.blin@softathome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 2a32d9167d3b931fb82c434bb0198e27bfc1d8ae..bee3689beeb4aefdf8348f39e381cfdf3bb521c3 100644 (file)
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -67,6 +67,32 @@ static const u8 mbm_guid[16] = {
        0xa6, 0x07, 0xc0, 0xff, 0xcb, 0x7e, 0x39, 0x2a,
 };
 
+static void usbnet_cdc_update_filter(struct usbnet *dev)
+{
+       struct cdc_state        *info = (void *) &dev->data;
+       struct usb_interface    *intf = info->control;
+
+       u16 cdc_filter =
+           USB_CDC_PACKET_TYPE_ALL_MULTICAST | USB_CDC_PACKET_TYPE_DIRECTED |
+           USB_CDC_PACKET_TYPE_BROADCAST;
+
+       /* FIXME cdc-ether has some multicast code too, though it complains
+        * in routine cases.  info->ether describes the multicast support.
+        * Implement that here, manipulating the cdc filter as needed.
+        */
+
+       usb_control_msg(dev->udev,
+                       usb_sndctrlpipe(dev->udev, 0),
+                       USB_CDC_SET_ETHERNET_PACKET_FILTER,
+                       USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+                       cdc_filter,
+                       intf->cur_altsetting->desc.bInterfaceNumber,
+                       NULL,
+                       0,
+                       USB_CTRL_SET_TIMEOUT
+               );
+}
+
 /* probes control interface, claims data interface, collects the bulk
  * endpoints, activates data interface (if needed), maybe sets MTU.
  * all pure cdc, except for certain firmware workarounds, and knowing
@@ -347,16 +373,8 @@ next_desc:
         * don't do reset all the way. So the packet filter should
         * be set to a sane initial value.
         */
-       usb_control_msg(dev->udev,
-                       usb_sndctrlpipe(dev->udev, 0),
-                       USB_CDC_SET_ETHERNET_PACKET_FILTER,
-                       USB_TYPE_CLASS | USB_RECIP_INTERFACE,
-                       USB_CDC_PACKET_TYPE_ALL_MULTICAST | USB_CDC_PACKET_TYPE_DIRECTED | USB_CDC_PACKET_TYPE_BROADCAST,
-                       intf->cur_altsetting->desc.bInterfaceNumber,
-                       NULL,
-                       0,
-                       USB_CTRL_SET_TIMEOUT
-               );
+       usbnet_cdc_update_filter(dev);
+
        return 0;
 
 bad_desc:
@@ -468,10 +486,6 @@ int usbnet_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
                return status;
        }
 
-       /* FIXME cdc-ether has some multicast code too, though it complains
-        * in routine cases.  info->ether describes the multicast support.
-        * Implement that here, manipulating the cdc filter as needed.
-        */
        return 0;
 }
 EXPORT_SYMBOL_GPL(usbnet_cdc_bind);