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USB: add urb->unlinked field

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This patch (as970) adds a new urb->unlinked field, which is used to
store the status of unlinked URBs since we can't use urb->status for
that purpose any more.  To help simplify the HCDs, usbcore will check
urb->unlinked before calling the completion handler; if the value is
set it will automatically override the status reported by the HCD.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
CC: Olav Kongas <ok@artecdesign.ee>
CC: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
CC: Tony Olech <tony.olech@elandigitalsystems.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2007-08-21 15:40:36 -04:00
committed by Greg Kroah-Hartman
parent b0d9efba3e
commit eb23105462
11 changed files with 108 additions and 125 deletions
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9
drivers/usb/host/uhci-q.c
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@ -1557,15 +1557,12 @@ static void uhci_scan_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
break;
spin_lock(&urb->lock);
if (urb->status == -EINPROGRESS) /* Not dequeued */
urb->status = status;
else
status = ECONNRESET; /* Not -ECONNRESET */
urb->status = status;
spin_unlock(&urb->lock);
/* Dequeued but completed URBs can't be given back unless
* the QH is stopped or has finished unlinking. */
if (status == ECONNRESET) {
if (urb->unlinked) {
if (QH_FINISHED_UNLINKING(qh))
qh->is_stopped = 1;
else if (!qh->is_stopped)
@ -1588,7 +1585,7 @@ static void uhci_scan_qh(struct uhci_hcd *uhci, struct uhci_qh *qh)
restart:
list_for_each_entry(urbp, &qh->queue, node) {
urb = urbp->urb;
if (urb->status != -EINPROGRESS) {
if (urb->unlinked) {
/* Fix up the TD links and save the toggles for
* non-Isochronous queues. For Isochronous queues,