[PATCH 7/9] USB usbfs: destroy submitted urbs only on the disconnected interface

[Duncan Sands <baldrick@free.fr>]

The remaining three patches contain miscellaneous fixes to usbfs.
This one fixes up the disconnect callback to only shoot down urbs
on the disconnected interface, and not on all interfaces.  It also adds
a sanity check (this check is pointless because the interface could
never have been claimed in the first place if it failed, but I feel better
having it there).

 devio.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)


diff -Nru a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
--- a/drivers/usb/core/devio.c	Wed Apr 14 12:18:20 2004
+++ b/drivers/usb/core/devio.c	Wed Apr 14 12:18:20 2004
@@ -341,6 +341,7 @@
 static void driver_disconnect(struct usb_interface *intf)
 {
 	struct dev_state *ps = usb_get_intfdata (intf);
+	unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
 
 	if (!ps)
 		return;
@@ -349,11 +350,12 @@
 	 * all pending I/O requests; 2.6 does that.
 	 */
 
-	clear_bit(intf->cur_altsetting->desc.bInterfaceNumber, &ps->ifclaimed);
+	if (ifnum < 8*sizeof(ps->ifclaimed))
+		clear_bit(ifnum, &ps->ifclaimed);
 	usb_set_intfdata (intf, NULL);
 
 	/* force async requests to complete */
-	destroy_all_async (ps);
+	destroy_async_on_interface(ps, ifnum);
 }
 
 struct usb_driver usbdevfs_driver = {