Revert "cdc_subset: deal with a device that needs reset for timeout"

This reverts commit 20fbe3ae990fd54fc7d1f889d61958bc8b38f254.

As reported by Stephen Rothwell, it causes compile failures in certain
configurations:

  drivers/net/usb/cdc_subset.c:360:15: error: 'dummy_prereset' undeclared here (not in a function)
    .pre_reset = dummy_prereset,
                 ^
  drivers/net/usb/cdc_subset.c:361:16: error: 'dummy_postreset' undeclared here (not in a function)
    .post_reset = dummy_postreset,
                  ^

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: David Miller <davem@davemloft.net>
Cc: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/net/usb/cdc_subset.c

@@ -85,34 +85,9 @@ static int always_connected (struct usbnet *dev)
  *
  *-------------------------------------------------------------------------*/
 
-static void m5632_recover(struct usbnet *dev)
-{
-	struct usb_device	*udev = dev->udev;
-	struct usb_interface	*intf = dev->intf;
-	int r;
-
-	r = usb_lock_device_for_reset(udev, intf);
-	if (r < 0)
-		return;
-
-	usb_reset_device(udev);
-	usb_unlock_device(udev);
-}
-
-static int dummy_prereset(struct usb_interface *intf)
-{
-	return 0;
-}
-
-static int dummy_postreset(struct usb_interface *intf)
-{
-	return 0;
-}
-
 static const struct driver_info	ali_m5632_info = {
 	.description =	"ALi M5632",
 	.flags       = FLAG_POINTTOPOINT,
-	.recover     = m5632_recover,
 };
 
 #endif
@@ -357,8 +332,6 @@ static struct usb_driver cdc_subset_driver = {
 	.probe =	usbnet_probe,
 	.suspend =	usbnet_suspend,
 	.resume =	usbnet_resume,
-	.pre_reset =	dummy_prereset,
-	.post_reset =	dummy_postreset,
 	.disconnect =	usbnet_disconnect,
 	.id_table =	products,
 	.disable_hub_initiated_lpm = 1,

drivers/net/usb/usbnet.c

@@ -1218,12 +1218,8 @@ void usbnet_tx_timeout (struct net_device *net)
 
 	unlink_urbs (dev, &dev->txq);
 	tasklet_schedule (&dev->bh);
-	/* this needs to be handled individually because the generic layer
-	 * doesn't know what is sufficient and could not restore private
-	 * information if a remedy of an unconditional reset were used.
-	 */
-	if (dev->driver_info->recover)
-		(dev->driver_info->recover)(dev);
+
+	// FIXME: device recovery -- reset?
 }
 EXPORT_SYMBOL_GPL(usbnet_tx_timeout);
 

include/linux/usb/usbnet.h

@@ -148,9 +148,6 @@ struct driver_info {
 	struct sk_buff	*(*tx_fixup)(struct usbnet *dev,
 				struct sk_buff *skb, gfp_t flags);
 
-	/* recover from timeout */
-	void	(*recover)(struct usbnet *dev);
-
 	/* early initialization code, can sleep. This is for minidrivers
 	 * having 'subminidrivers' that need to do extra initialization
 	 * right after minidriver have initialized hardware. */