Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 24 insertions, 26 deletions

diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 233c288e3f93..5d6bc624c961 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -315,7 +315,6 @@ qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh)
         int                     stopped;
         unsigned                count = 0;
         u8                      state;
-        const __le32            halt = HALT_BIT(ehci);
         struct ehci_qh_hw       *hw = qh->hw;
 
         if (unlikely (list_empty (&qh->qtd_list)))
@@ -422,7 +421,6 @@ qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh)
                                         && !(qtd->hw_alt_next
                                                 & EHCI_LIST_END(ehci))) {
                                 stopped = 1;
-                                goto halt;
                         }
 
                 /* stop scanning when we reach qtds the hc is using */
@@ -456,16 +454,6 @@ qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh)
                                  */
                                 ehci_clear_tt_buffer(ehci, qh, urb, token);
                         }
-
-                        /* force halt for unlinked or blocked qh, so we'll
-                         * patch the qh later and so that completions can't
-                         * activate it while we "know" it's stopped.
-                         */
-                        if ((halt & hw->hw_token) == 0) {
-halt:
-                                hw->hw_token |= halt;
-                                wmb ();
-                        }
                 }
 
                 /* unless we already know the urb's status, collect qtd status
@@ -838,6 +826,7 @@ qh_make (
                                 is_input, 0,
                                 hb_mult(maxp) * max_packet(maxp)));
                 qh->start = NO_FRAME;
+                qh->stamp = ehci->periodic_stamp;
 
                 if (urb->dev->speed == USB_SPEED_HIGH) {
                         qh->c_usecs = 0;
@@ -1107,22 +1096,24 @@ submit_async (
         struct list_head        *qtd_list,
         gfp_t                   mem_flags
 ) {
-        struct ehci_qtd         *qtd;
         int                     epnum;
         unsigned long           flags;
         struct ehci_qh          *qh = NULL;
         int                     rc;
 
-        qtd = list_entry (qtd_list->next, struct ehci_qtd, qtd_list);
         epnum = urb->ep->desc.bEndpointAddress;
 
 #ifdef EHCI_URB_TRACE
-        ehci_dbg (ehci,
-                "%s %s urb %p ep%d%s len %d, qtd %p [qh %p]\n",
-                __func__, urb->dev->devpath, urb,
-                epnum & 0x0f, (epnum & USB_DIR_IN) ? "in" : "out",
-                urb->transfer_buffer_length,
-                qtd, urb->ep->hcpriv);
+        {
+                struct ehci_qtd *qtd;
+                qtd = list_entry(qtd_list->next, struct ehci_qtd, qtd_list);
+                ehci_dbg(ehci,
+                         "%s %s urb %p ep%d%s len %d, qtd %p [qh %p]\n",
+                         __func__, urb->dev->devpath, urb,
+                         epnum & 0x0f, (epnum & USB_DIR_IN) ? "in" : "out",
+                         urb->transfer_buffer_length,
+                         qtd, urb->ep->hcpriv);
+        }
 #endif
 
         spin_lock_irqsave (&ehci->lock, flags);
@@ -1193,6 +1184,10 @@ static void end_unlink_async (struct ehci_hcd *ehci)
                 ehci->reclaim = NULL;
                 start_unlink_async (ehci, next);
         }
+
+        if (ehci->has_synopsys_hc_bug)
+                ehci_writel(ehci, (u32) ehci->async->qh_dma,
+                            &ehci->regs->async_next);
 }
 
 /* makes sure the async qh will become idle */
@@ -1257,24 +1252,27 @@ static void start_unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
 
 static void scan_async (struct ehci_hcd *ehci)
 {
+        bool                    stopped;
         struct ehci_qh          *qh;
         enum ehci_timer_action  action = TIMER_IO_WATCHDOG;
 
         ehci->stamp = ehci_readl(ehci, &ehci->regs->frame_index);
         timer_action_done (ehci, TIMER_ASYNC_SHRINK);
 rescan:
+        stopped = !HC_IS_RUNNING(ehci_to_hcd(ehci)->state);
         qh = ehci->async->qh_next.qh;
         if (likely (qh != NULL)) {
                 do {
                         /* clean any finished work for this qh */
-                        if (!list_empty (&qh->qtd_list)
-                                        && qh->stamp != ehci->stamp) {
+                        if (!list_empty(&qh->qtd_list) && (stopped ||
+                                        qh->stamp != ehci->stamp)) {
                                 int temp;
 
                                 /* unlinks could happen here; completion
                                  * reporting drops the lock.  rescan using
                                  * the latest schedule, but don't rescan
-                                 * qhs we already finished (no looping).
+                                 * qhs we already finished (no looping)
+                                 * unless the controller is stopped.
                                  */
                                 qh = qh_get (qh);
                                 qh->stamp = ehci->stamp;
@@ -1295,9 +1293,9 @@ rescan:
                          */
                         if (list_empty(&qh->qtd_list)
                                         && qh->qh_state == QH_STATE_LINKED) {
-                                if (!ehci->reclaim
-                                        && ((ehci->stamp - qh->stamp) & 0x1fff)
-                                                >= (EHCI_SHRINK_FRAMES * 8))
+                                if (!ehci->reclaim && (stopped ||
+                                        ((ehci->stamp - qh->stamp) & 0x1fff)
+                                                >= EHCI_SHRINK_FRAMES * 8))
                                         start_unlink_async(ehci, qh);
                                 else
                                         action = TIMER_ASYNC_SHRINK;