[RFC PATCH 1/3] usbnet: introduce usbnet_link_change API
From: Ming Lei <hidden>
Date: 2012-09-15 17:48:17
Subsystem:
networking drivers, the rest, usb "usbnet" driver framework, usb networking drivers, usb subsystem · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Oliver Neukum, Greg Kroah-Hartman
This patch introduces the API of usbnet_link_change, so that usbnet can trace the link change, which may help to implement the later runtime PM triggered by usb ethernet link change. Signed-off-by: Ming Lei <redacted> --- drivers/net/usb/usbnet.c | 11 +++++++++++ include/linux/usb/usbnet.h | 2 +- 2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index e944109..95a96b1 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c@@ -1591,6 +1591,17 @@ int usbnet_resume (struct usb_interface *intf) } EXPORT_SYMBOL_GPL(usbnet_resume); +void usbnet_link_change(struct usbnet *dev, int link, int need_reset) +{ + if (link) + netif_carrier_on(dev->net); + else + netif_carrier_off(dev->net); + + if (need_reset && link) + usbnet_defer_kevent(dev, EVENT_LINK_RESET); +} +EXPORT_SYMBOL_GPL(usbnet_link_change); /*-------------------------------------------------------------------------*/
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index f87cf62..1937b74 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h@@ -160,7 +160,7 @@ extern int usbnet_probe(struct usb_interface *, const struct usb_device_id *); extern int usbnet_suspend(struct usb_interface *, pm_message_t); extern int usbnet_resume(struct usb_interface *); extern void usbnet_disconnect(struct usb_interface *);