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Message-Id: <200708031352.19419.oneukum@suse.de>
Date: Fri, 3 Aug 2007 13:52:19 +0200
From: Oliver Neukum <oneukum@...e.de>
To: jgarzik@...ox.com, netdev@...r.kernel.org,
David Brownell <david-b@...bell.net>
Subject: [patch]support for USB autosuspend in the asix driver
Hi,
this implements support for USB autosuspend in the asix USB ethernet
driver.
Regards
Oliver
Signed-off-by: Oliver Neukum <oneukum@...e.de>
---
--- a/drivers/net/usb/asix.c 2007-08-03 13:16:31.000000000 +0200
+++ b/drivers/net/usb/asix.c 2007-08-03 13:17:05.000000000 +0200
@@ -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)
--- a/drivers/net/usb/usbnet.c 2007-08-03 13:16:53.000000000 +0200
+++ b/drivers/net/usb/usbnet.c 2007-08-03 13:19:31.000000000 +0200
@@ -588,6 +588,7 @@ static int usbnet_stop (struct net_devic
dev->flags = 0;
del_timer_sync (&dev->delay);
tasklet_kill (&dev->bh);
+ usb_autopm_put_interface(dev->intf);
return 0;
}
@@ -601,9 +602,19 @@ static int usbnet_stop (struct net_devic
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))
@@ -657,7 +668,10 @@ static int usbnet_open (struct net_devic
// 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;
}
@@ -1141,6 +1155,7 @@ usbnet_probe (struct usb_interface *udev
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
@@ -1265,12 +1280,18 @@ int usbnet_suspend (struct usb_interface
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;
}
@@ -1280,10 +1301,9 @@ int usbnet_resume (struct usb_interface
{
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);
--- a/drivers/net/usb/usbnet.h 2007-08-03 13:16:44.000000000 +0200
+++ b/drivers/net/usb/usbnet.h 2007-08-03 13:17:05.000000000 +0200
@@ -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;
-
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