uhci-hcd: fix list access bug

When skipping to the last TD of an URB, go to the _last_ entry in the
list instead of the _first_ entry (as780).  This fixes Bugzilla #6747
and possibly others.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 026dad0..431e8f3 100644 (file)
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -372,7 +372,7 @@ static void uhci_fixup_toggles(struct uhci_qh *qh, int skip_first)
                 * need to change any toggles in this URB */
                td = list_entry(urbp->td_list.next, struct uhci_td, list);
                if (toggle > 1 || uhci_toggle(td_token(td)) == toggle) {
-                       td = list_entry(urbp->td_list.next, struct uhci_td,
+                       td = list_entry(urbp->td_list.prev, struct uhci_td,
                                        list);
                        toggle = uhci_toggle(td_token(td)) ^ 1;