USB: EHCI: store reason for unlinking a QH
This patch replaces the "exception" bitflag in the ehci_qh structure
with a more explicit "unlink_reason" bitmask. This is for use in the
following patch, where we will need to have a good idea of the
reason for unlinking a QH, not just "something exceptional happened".
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Michael Reutman <mreutman@epiqsolutions.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 00e77cc..c5465bf 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -911,7 +911,7 @@
*/
} else {
qh = (struct ehci_qh *) urb->hcpriv;
- qh->exception = 1;
+ qh->unlink_reason |= QH_UNLINK_REQUESTED;
switch (qh->qh_state) {
case QH_STATE_LINKED:
if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)
@@ -972,10 +972,13 @@
goto done;
}
- qh->exception = 1;
+ qh->unlink_reason |= QH_UNLINK_REQUESTED;
switch (qh->qh_state) {
case QH_STATE_LINKED:
- WARN_ON(!list_empty(&qh->qtd_list));
+ if (list_empty(&qh->qtd_list))
+ qh->unlink_reason |= QH_UNLINK_QUEUE_EMPTY;
+ else
+ WARN_ON(1);
if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_INT)
start_unlink_async(ehci, qh);
else
@@ -1042,7 +1045,7 @@
* re-linking will call qh_refresh().
*/
usb_settoggle(qh->ps.udev, epnum, is_out, 0);
- qh->exception = 1;
+ qh->unlink_reason |= QH_UNLINK_REQUESTED;
if (eptype == USB_ENDPOINT_XFER_BULK)
start_unlink_async(ehci, qh);
else