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authorOliver Neukum <oneukum@suse.de>2007-04-30 01:37:44 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-05-22 23:45:48 -0700
commit36433127ae7a842482ba857f5ad3c431817a9542 (patch)
tree447195ec8d717269380287e454ddb0c11c336ec5 /drivers
parent741ec4e6d0b7780d29a63f908d6d21df425be365 (diff)
USB: address FIXME in usbnet w.r.t drivers claiming multiple interfaces
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/usb/usbnet.c25
-rw-r--r--drivers/net/usb/usbnet.h1
2 files changed, 16 insertions, 10 deletions
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index f9cd42d058b..5b16d9a1269 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -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);
diff --git a/drivers/net/usb/usbnet.h b/drivers/net/usb/usbnet.h
index 82db5a8e528..a3f8b9e7bc0 100644
--- a/drivers/net/usb/usbnet.h
+++ b/drivers/net/usb/usbnet.h
@@ -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;