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| author | Alan Stern <stern@rowland.harvard.edu> | 2012-07-11 11:21:43 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-16 16:50:13 -0700 |
| commit | 2f5bb665ba7a14c5842fa2e1cde2be039843a2a2 (patch) | |
| tree | 32a40c6858e39a56377b2964be5f90cda47bb801 /drivers/usb/host/ehci-q.c | |
| parent | 99ac5b1e9536f142461681fa6143a947d66b4279 (diff) | |
| download | op-kernel-dev-2f5bb665ba7a14c5842fa2e1cde2be039843a2a2.zip op-kernel-dev-2f5bb665ba7a14c5842fa2e1cde2be039843a2a2.tar.gz | |
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')
| -rw-r--r-- | drivers/usb/host/ehci-q.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index 8e80cde..5193612 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) |
