path: root/drivers/usb/host/ehci-q.c
diff options
authorAlan Stern <stern@rowland.harvard.edu>2012-07-11 11:21:43 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-07-16 16:50:13 -0700
commit2f5bb665ba7a14c5842fa2e1cde2be039843a2a2 (patch)
tree32a40c6858e39a56377b2964be5f90cda47bb801 /drivers/usb/host/ehci-q.c
parent99ac5b1e9536f142461681fa6143a947d66b4279 (diff)
USB: EHCI: add pointer to end of async-unlink list
This patch (as1570) adds a pointer for the end of ehci-hcd's async-unlink list. The list (which is actually a queue) is singly linked, so having a pointer to its end makes adding new entries easier -- there's no longer any need to scan through the whole list. In principle it could be changed to a standard doubly-linked list. It turns out that doing so actually makes the code less clear, so I'm leaving it as is. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-q.c')
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 8e80cde8c35e..5193612c96ea 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -1227,6 +1227,8 @@ static void start_unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
qh->qh_state = QH_STATE_UNLINK;
ehci->async_unlink = qh;
+ if (!qh->unlink_next)
+ ehci->async_unlink_last = qh;
prev = ehci->async;
while (prev->qh_next.qh != qh)