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 <ming.lei@xxxxxxxxxxxxx>
---
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 *);
-
+extern void usbnet_link_change(struct usbnet *dev, int link, int need_reset);
/* Drivers that reuse some of the standard USB CDC infrastructure
* (notably, using multiple interfaces according to the CDC
--
1.7.9.5
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