USB: add urb->unlinked field

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>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 8aad6199cdcc..3c793fad178d 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -758,8 +758,7 @@ static void td_done (struct ohci_hcd *ohci, struct urb *urb, struct td *td)
                         cc = TD_CC_NOERROR;
                 if (cc != TD_CC_NOERROR && cc < 0x0E) {
                         spin_lock (&urb->lock);
-                        if (urb->status == -EINPROGRESS)
-                                urb->status = cc_to_error [cc];
+                        urb->status = cc_to_error[cc];
                         spin_unlock (&urb->lock);
                 }
 
@@ -972,7 +971,7 @@ rescan_this:
                         urb = td->urb;
                         urb_priv = td->urb->hcpriv;
 
-                        if (urb->status == -EINPROGRESS) {
+                        if (!urb->unlinked) {
                                 prev = &td->hwNextTD;
                                 continue;
                         }