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USB: address FIXME in usbnet w.r.t drivers claiming multiple interfaces

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This fixes the issue of drivers claiming multiple interfaces. Operations
are stopped as soon as an interface is suspend and resumed only as
all interfaces have been resumed.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum 2007-04-30 01:37:44 -07:00 committed by Greg Kroah-Hartman
parent 741ec4e6d0
commit 36433127ae
2 changed files with 16 additions and 10 deletions
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25
drivers/net/usb/usbnet.c
View file

@ -1252,20 +1252,23 @@ EXPORT_SYMBOL_GPL(usbnet_probe);
/*-------------------------------------------------------------------------*/
/* FIXME these suspend/resume methods assume non-CDC style
* devices, with only one interface.
/*
* suspend the whole driver as soon as the first interface is suspended
* resume only when the last interface is resumed
*/
int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
{
struct usbnet *dev = usb_get_intfdata(intf);
/* 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);
if (!dev->suspend_count++) {
/* 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);
}
return 0;
}
EXPORT_SYMBOL_GPL(usbnet_suspend);
@ -1274,8 +1277,10 @@ int usbnet_resume (struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
netif_device_attach (dev->net);
tasklet_schedule (&dev->bh);
if (!--dev->suspend_count) {
netif_device_attach (dev->net);
tasklet_schedule (&dev->bh);
}
return 0;
}
EXPORT_SYMBOL_GPL(usbnet_resume);

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

@ -32,6 +32,7 @@ struct usbnet {
const char *driver_name;
wait_queue_head_t *wait;
struct mutex phy_mutex;
unsigned char suspend_count;
/* i/o info: pipes etc */
unsigned in, out;