1 files changed, 10 insertions, 58 deletions

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index a0b248c34526..0ed64eb68e48 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -307,13 +307,14 @@ static int xhci_abort_cmd_ring(struct xhci_hcd *xhci)
                 return 0;
         }
 
-        temp_64 = readq(&xhci->op_regs->cmd_ring);
+        temp_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring);
         if (!(temp_64 & CMD_RING_RUNNING)) {
                 xhci_dbg(xhci, "Command ring had been stopped\n");
                 return 0;
         }
         xhci->cmd_ring_state = CMD_RING_STATE_ABORTED;
-        writeq(temp_64 | CMD_RING_ABORT, &xhci->op_regs->cmd_ring);
+        xhci_write_64(xhci, temp_64 | CMD_RING_ABORT,
+                        &xhci->op_regs->cmd_ring);
 
         /* Section 4.6.1.2 of xHCI 1.0 spec says software should
          * time the completion od all xHCI commands, including
@@ -2864,8 +2865,9 @@ hw_died:
                 /* Clear the event handler busy flag (RW1C);
                  * the event ring should be empty.
                  */
-                temp_64 = readq(&xhci->ir_set->erst_dequeue);
-                writeq(temp_64 | ERST_EHB, &xhci->ir_set->erst_dequeue);
+                temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
+                xhci_write_64(xhci, temp_64 | ERST_EHB,
+                                &xhci->ir_set->erst_dequeue);
                 spin_unlock(&xhci->lock);
 
                 return IRQ_HANDLED;
@@ -2877,7 +2879,7 @@ hw_died:
          */
         while (xhci_handle_event(xhci) > 0) {}
 
-        temp_64 = readq(&xhci->ir_set->erst_dequeue);
+        temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
         /* If necessary, update the HW's version of the event ring deq ptr. */
         if (event_ring_deq != xhci->event_ring->dequeue) {
                 deq = xhci_trb_virt_to_dma(xhci->event_ring->deq_seg,
@@ -2892,7 +2894,7 @@ hw_died:
 
         /* Clear the event handler busy flag (RW1C); event ring is empty. */
         temp_64 |= ERST_EHB;
-        writeq(temp_64, &xhci->ir_set->erst_dequeue);
+        xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue);
 
         spin_unlock(&xhci->lock);
 
@@ -2965,58 +2967,8 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
         }
 
         while (1) {
-                if (room_on_ring(xhci, ep_ring, num_trbs)) {
-                        union xhci_trb *trb = ep_ring->enqueue;
-                        unsigned int usable = ep_ring->enq_seg->trbs +
-                                        TRBS_PER_SEGMENT - 1 - trb;
-                        u32 nop_cmd;
-
-                        /*
-                         * Section 4.11.7.1 TD Fragments states that a link
-                         * TRB must only occur at the boundary between
-                         * data bursts (eg 512 bytes for 480M).
-                         * While it is possible to split a large fragment
-                         * we don't know the size yet.
-                         * Simplest solution is to fill the trb before the
-                         * LINK with nop commands.
-                         */
-                        if (num_trbs == 1 || num_trbs <= usable || usable == 0)
-                                break;
-
-                        if (ep_ring->type != TYPE_BULK)
-                                /*
-                                 * While isoc transfers might have a buffer that
-                                 * crosses a 64k boundary it is unlikely.
-                                 * Since we can't add NOPs without generating
-                                 * gaps in the traffic just hope it never
-                                 * happens at the end of the ring.
-                                 * This could be fixed by writing a LINK TRB
-                                 * instead of the first NOP - however the
-                                 * TRB_TYPE_LINK_LE32() calls would all need
-                                 * changing to check the ring length.
-                                 */
-                                break;
-
-                        if (num_trbs >= TRBS_PER_SEGMENT) {
-                                xhci_err(xhci, "Too many fragments %d, max %d\n",
-                                                num_trbs, TRBS_PER_SEGMENT - 1);
-                                return -EINVAL;
-                        }
-
-                        nop_cmd = cpu_to_le32(TRB_TYPE(TRB_TR_NOOP) |
-                                        ep_ring->cycle_state);
-                        ep_ring->num_trbs_free -= usable;
-                        do {
-                                trb->generic.field[0] = 0;
-                                trb->generic.field[1] = 0;
-                                trb->generic.field[2] = 0;
-                                trb->generic.field[3] = nop_cmd;
-                                trb++;
-                        } while (--usable);
-                        ep_ring->enqueue = trb;
-                        if (room_on_ring(xhci, ep_ring, num_trbs))
-                                break;
-                }
+                if (room_on_ring(xhci, ep_ring, num_trbs))
+                        break;
 
                 if (ep_ring == xhci->cmd_ring) {
                         xhci_err(xhci, "Do not support expand command ring\n");