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Commit 6509141f authored by Wei Shuai's avatar Wei Shuai Committed by David S. Miller
Browse files

usbnet: add new flag FLAG_NOARP for usb net devices 



We do have some USB net devices, which cannot do ARP.
so we can introduce a new flag FLAG_NOARP, then client drivers
can easily handle this kind of devices

Signed-off-by: default avatarWei Shuai <cpuwolf@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f91f3345

drivers/net/usb/usbnet.c

+4 −0
Original line number Diff line number Diff line
@@ -1448,6 +1448,10 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) 
		if ((dev->driver_info->flags & FLAG_WWAN) != 0)

			strcpy(net->name, "wwan%d");



		/* devices that cannot do ARP */

		if ((dev->driver_info->flags & FLAG_NOARP) != 0)

			net->flags |= IFF_NOARP;



		/* maybe the remote can't receive an Ethernet MTU */

		if (net->mtu > (dev->hard_mtu - net->hard_header_len))

			net->mtu = dev->hard_mtu - net->hard_header_len;

include/linux/usb/usbnet.h

+1 −0
Original line number Diff line number Diff line
@@ -100,6 +100,7 @@ struct driver_info { 
#define FLAG_LINK_INTR	0x0800		/* updates link (carrier) status */



#define FLAG_POINTTOPOINT 0x1000	/* possibly use "usb%d" names */

#define FLAG_NOARP	0x2000		/* device can't do ARP */



/*

 * Indicates to usbnet, that USB driver accumulates multiple IP packets.