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support for USB autosuspend in the asix driver 

this implements support for USB autosuspend in the asix USB ethernet
driver.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Oliver Neukum 2007-08-03 13:52:19 +02:00 committed by David S. Miller
parent bc7f75fa97
commit a11a6544c0
3 changed files with 27 additions and 5 deletions
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1
drivers/net/usb/asix.c
View File

@ -1474,6 +1474,7 @@ static struct usb_driver asix_driver = {
.suspend = usbnet_suspend,
.resume = usbnet_resume,
.disconnect = usbnet_disconnect,
.supports_autosuspend = 1,
};
static int __init asix_init(void)

30
drivers/net/usb/usbnet.c
View File

@ -590,6 +590,7 @@ static int usbnet_stop (struct net_device *net)
dev->flags = 0;
del_timer_sync (&dev->delay);
tasklet_kill (&dev->bh);
usb_autopm_put_interface(dev->intf);
return 0;
}
@ -603,9 +604,19 @@ static int usbnet_stop (struct net_device *net)
static int usbnet_open (struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
int retval = 0;
int retval;
struct driver_info *info = dev->driver_info;
if ((retval = usb_autopm_get_interface(dev->intf)) < 0) {
if (netif_msg_ifup (dev))
devinfo (dev,
"resumption fail (%d) usbnet usb-%s-%s, %s",
retval,
dev->udev->bus->bus_name, dev->udev->devpath,
info->description);
goto done_nopm;
}
// put into "known safe" state
if (info->reset && (retval = info->reset (dev)) < 0) {
if (netif_msg_ifup (dev))
@ -659,7 +670,10 @@ static int usbnet_open (struct net_device *net)
// delay posting reads until we're fully open
tasklet_schedule (&dev->bh);
return retval;
done:
usb_autopm_put_interface(dev->intf);
done_nopm:
return retval;
}
@ -1143,6 +1157,7 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
dev = netdev_priv(net);
dev->udev = xdev;
dev->intf = udev;
dev->driver_info = info;
dev->driver_name = name;
dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
@ -1267,12 +1282,18 @@ int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
struct usbnet *dev = usb_get_intfdata(intf);
if (!dev->suspend_count++) {
/* accelerate emptying of the rx and queues, to avoid
/*
* accelerate emptying of the rx and queues, to avoid
* having everything error out.
*/
netif_device_detach (dev->net);
(void) unlink_urbs (dev, &dev->rxq);
(void) unlink_urbs (dev, &dev->txq);
/*
* reattach so runtime management can use and
* wake the device
*/
netif_device_attach (dev->net);
}
return 0;
}
@ -1282,10 +1303,9 @@ int usbnet_resume (struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
if (!--dev->suspend_count) {
netif_device_attach (dev->net);
if (!--dev->suspend_count)
tasklet_schedule (&dev->bh);
}
return 0;
}
EXPORT_SYMBOL_GPL(usbnet_resume);

1
drivers/net/usb/usbnet.h
View File

@ -28,6 +28,7 @@
struct usbnet {
/* housekeeping */
struct usb_device *udev;
struct usb_interface *intf;
struct driver_info *driver_info;
const char *driver_name;
wait_queue_head_t *wait;