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: Ming Lei <ming....@canonical.com>
---
drivers/net/usb/usbnet.c | 13 +++++++++++++
include/linux/usb/usbnet.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 51f3192..40e4237 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -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)
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index 0e5ac93..eb021b8 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -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 */
--
1.7.9.5
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