usb/isp1760: Fix missing endpoint unlink when no mem during enqueue

... and some small code style fixes.

Signed-off-by: Arvid Brodin <arvid.brodin@enea.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
index 14c9238..1eb69e0 100644 (file)
--- a/drivers/usb/host/isp1760-hcd.c
+++ b/drivers/usb/host/isp1760-hcd.c
@@ -777,10 +777,7 @@ static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh,
                if (qtd->status < QTD_XFER_COMPLETE)
                        break;
 
-               if (list_is_last(&qtd->qtd_list, &qh->qtd_list))
-                       last_qtd = 1;
-               else
-                       last_qtd = qtd->urb != qtd_next->urb;
+               last_qtd = last_qtd_of_urb(qtd, qh);
 
                if ((!last_qtd) && (qtd->status == QTD_RETIRE))
                        qtd_next->status = QTD_RETIRE;
@@ -821,7 +818,7 @@ static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh,
                        urb_listitem = kmem_cache_zalloc(urb_listitem_cachep,
                                                                GFP_ATOMIC);
                        if (unlikely(!urb_listitem))
-                               break;
+                               break; /* Try again on next call */
                        urb_listitem->urb = qtd->urb;
                        list_add_tail(&urb_listitem->urb_list, urb_list);
                }
@@ -1543,7 +1540,6 @@ static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
        packetize_urb(hcd, urb, &new_qtds, mem_flags);
        if (list_empty(&new_qtds))
                return -ENOMEM;
-       urb->hcpriv = NULL; /* Used to signal unlink to interrupt handler */
 
        retval = 0;
        spin_lock_irqsave(&priv->lock, spinflags);
@@ -1571,6 +1567,7 @@ static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
                qh = qh_alloc(GFP_ATOMIC);
                if (!qh) {
                        retval = -ENOMEM;
+                       usb_hcd_unlink_urb_from_ep(hcd, urb);
                        goto out;
                }
                list_add_tail(&qh->qh_list, ep_queue);