Commit ac64995d authored by Ming Lei's avatar Ming Lei Committed by David S. Miller
Browse files

usbnet: introduce usbnet_link_change API 



This patch introduces the API of usbnet_link_change, so that
usbnet can handle link change centrally, which may help to
implement killing traffic URBs for saving USB bus bandwidth
and host controller power.

Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 763eff57

drivers/net/usb/usbnet.c

+13 −0
Original line number Diff line number Diff line
@@ -1653,6 +1653,19 @@ int usbnet_manage_power(struct usbnet *dev, int on) 
}

EXPORT_SYMBOL(usbnet_manage_power);



void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset)

{

	/* update link after link is reseted */

	if (link && !need_reset)

		netif_carrier_on(dev->net);

	else

		netif_carrier_off(dev->net);



	if (need_reset && link)

		usbnet_defer_kevent(dev, EVENT_LINK_RESET);

}

EXPORT_SYMBOL(usbnet_link_change);



/*-------------------------------------------------------------------------*/

static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,

			     u16 value, u16 index, void *data, u16 size)

include/linux/usb/usbnet.h

+1 −0
Original line number Diff line number Diff line
@@ -245,5 +245,6 @@ extern void usbnet_get_drvinfo(struct net_device *, struct ethtool_drvinfo *); 
extern int usbnet_nway_reset(struct net_device *net);



extern int usbnet_manage_power(struct usbnet *, int);

extern void usbnet_link_change(struct usbnet *, bool, bool);



#endif /* __LINUX_USB_USBNET_H */