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cdc-ether: implement MULTICAST flag on the device

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Olivier having laid the groundwork this patch transmits the
multicast flag to the device to save some bus traffic.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oliver Neukum 2014-11-06 15:19:14 +01:00 committed by David S. Miller
parent df32dd2054
commit f46ad73ac6
1 changed files with 10 additions and 9 deletions
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19
drivers/net/usb/cdc_ether.c
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@ -71,18 +71,19 @@ static void usbnet_cdc_update_filter(struct usbnet *dev)
{
struct cdc_state *info = (void *) &dev->data;
struct usb_interface *intf = info->control;
struct net_device *net = dev->net;
u16 cdc_filter =
USB_CDC_PACKET_TYPE_ALL_MULTICAST | USB_CDC_PACKET_TYPE_DIRECTED |
USB_CDC_PACKET_TYPE_BROADCAST;
u16 cdc_filter = USB_CDC_PACKET_TYPE_DIRECTED
| USB_CDC_PACKET_TYPE_BROADCAST;
if (dev->net->flags & IFF_PROMISC)
cdc_filter |= USB_CDC_PACKET_TYPE_PROMISCUOUS;
/* 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.
/* filtering on the device is an optional feature and not worth
* the hassle so we just roughly care about snooping and if any
* multicast is requested, we take every multicast
*/
if (net->flags & IFF_PROMISC)
cdc_filter |= USB_CDC_PACKET_TYPE_PROMISCUOUS;
if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI))
cdc_filter |= USB_CDC_PACKET_TYPE_ALL_MULTICAST;
usb_control_msg(dev->udev,
usb_sndctrlpipe(dev->udev, 0),