xhci: Fold queue_set_tr_deq into xhci_queue_new_dequeue_state

xhci_queue_new_dequeue_state is the only caller of queue_set_tr_deq
and queue_set_tr_deq checks for SET_DEQ_PENDING, where as
xhci_queue_new_dequeue_state sets it which is inconsistent.

Simply fold the 2 into one is a nice cleanup and fixes the inconsistency.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-ring.c

@@ -572,38 +572,6 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
 	}
 }
 
-static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
-		unsigned int ep_index, unsigned int stream_id,
-		struct xhci_segment *deq_seg,
-		union xhci_trb *deq_ptr, u32 cycle_state);
-
-void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
-		unsigned int slot_id, unsigned int ep_index,
-		unsigned int stream_id,
-		struct xhci_dequeue_state *deq_state)
-{
-	struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index];
-
-	xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
-			"Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), "
-			"new deq ptr = %p (0x%llx dma), new cycle = %u",
-			deq_state->new_deq_seg,
-			(unsigned long long)deq_state->new_deq_seg->dma,
-			deq_state->new_deq_ptr,
-			(unsigned long long)xhci_trb_virt_to_dma(deq_state->new_deq_seg, deq_state->new_deq_ptr),
-			deq_state->new_cycle_state);
-	queue_set_tr_deq(xhci, slot_id, ep_index, stream_id,
-			deq_state->new_deq_seg,
-			deq_state->new_deq_ptr,
-			(u32) deq_state->new_cycle_state);
-	/* Stop the TD queueing code from ringing the doorbell until
-	 * this command completes.  The HC won't set the dequeue pointer
-	 * if the ring is running, and ringing the doorbell starts the
-	 * ring running.
-	 */
-	ep->ep_state |= SET_DEQ_PENDING;
-}
-
 static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci,
 		struct xhci_virt_ep *ep)
 {
@@ -3920,13 +3888,11 @@ int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd,
 			trb_slot_id | trb_ep_index | type | trb_suspend, false);
 }
 
-/* Set Transfer Ring Dequeue Pointer command.
- * This should not be used for endpoints that have streams enabled.
- */
-static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
-			unsigned int ep_index, unsigned int stream_id,
-			struct xhci_segment *deq_seg,
-			union xhci_trb *deq_ptr, u32 cycle_state)
+/* Set Transfer Ring Dequeue Pointer command */
+void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
+		unsigned int slot_id, unsigned int ep_index,
+		unsigned int stream_id,
+		struct xhci_dequeue_state *deq_state)
 {
 	dma_addr_t addr;
 	u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id);
@@ -3938,41 +3904,56 @@ static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
 	struct xhci_command *cmd;
 	int ret;
 
-	addr = xhci_trb_virt_to_dma(deq_seg, deq_ptr);
+	xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
+		"Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), new deq ptr = %p (0x%llx dma), new cycle = %u",
+		deq_state->new_deq_seg,
+		(unsigned long long)deq_state->new_deq_seg->dma,
+		deq_state->new_deq_ptr,
+		(unsigned long long)xhci_trb_virt_to_dma(
+			deq_state->new_deq_seg, deq_state->new_deq_ptr),
+		deq_state->new_cycle_state);
+
+	addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg,
+				    deq_state->new_deq_ptr);
 	if (addr == 0) {
 		xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n");
 		xhci_warn(xhci, "WARN deq seg = %p, deq pt = %p\n",
-				deq_seg, deq_ptr);
-		return 0;
+			  deq_state->new_deq_seg, deq_state->new_deq_ptr);
+		return;
 	}
 	ep = &xhci->devs[slot_id]->eps[ep_index];
 	if ((ep->ep_state & SET_DEQ_PENDING)) {
 		xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n");
 		xhci_warn(xhci, "A Set TR Deq Ptr command is pending.\n");
-		return 0;
+		return;
 	}
 
 	/* This function gets called from contexts where it cannot sleep */
 	cmd = xhci_alloc_command(xhci, false, false, GFP_ATOMIC);
 	if (!cmd) {
 		xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr: ENOMEM\n");
-		return 0;
+		return;
 	}
 
-	ep->queued_deq_seg = deq_seg;
-	ep->queued_deq_ptr = deq_ptr;
+	ep->queued_deq_seg = deq_state->new_deq_seg;
+	ep->queued_deq_ptr = deq_state->new_deq_ptr;
 	if (stream_id)
 		trb_sct = SCT_FOR_TRB(SCT_PRI_TR);
 	ret = queue_command(xhci, cmd,
-			lower_32_bits(addr) | trb_sct | cycle_state,
+		lower_32_bits(addr) | trb_sct | deq_state->new_cycle_state,
 		upper_32_bits(addr), trb_stream_id,
 		trb_slot_id | trb_ep_index | type, false);
 	if (ret < 0) {
 		xhci_free_command(xhci, cmd);
-		return ret;
+		return;
 	}
 
-	return 0;
+	/* Stop the TD queueing code from ringing the doorbell until
+	 * this command completes.  The HC won't set the dequeue pointer
+	 * if the ring is running, and ringing the doorbell starts the
+	 * ring running.
+	 */
+	ep->ep_state |= SET_DEQ_PENDING;
 }
 
 int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd,