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Commit 446b3141 authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
Browse files

xhci: refactor handle_tx_event() urb giveback 



Move giving back the urb to a separate function
No functional changes

Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2d6d5769

drivers/usb/host/xhci-ring.c

+32 −29
Original line number Diff line number Diff line
@@ -555,6 +555,7 @@ static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci, 
		ep->stop_cmds_pending--;

}





/* Must be called with xhci->lock held in interrupt context */

static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci,

		struct xhci_td *cur_td, int status)
@@ -586,6 +587,35 @@ static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci, 
	}

}



/*

 * giveback urb, must be called with xhci->lock held.

 * releases and re-aquires xhci->lock

 */

static void xhci_giveback_urb_locked(struct xhci_hcd *xhci, struct xhci_td *td,

				     int status)

{

	struct urb *urb	= td->urb;

	struct urb_priv	*urb_priv = urb->hcpriv;



	xhci_urb_free_priv(urb_priv);



	usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb);

	if ((urb->actual_length != urb->transfer_buffer_length &&

	     (urb->transfer_flags & URB_SHORT_NOT_OK)) ||

	    (status != 0 && !usb_endpoint_xfer_isoc(&urb->ep->desc)))

		xhci_dbg(xhci, "Giveback URB %p, len = %d, expected = %d, status = %d\n",

			 urb, urb->actual_length,

			 urb->transfer_buffer_length, status);

	spin_unlock(&xhci->lock);

	/* EHCI, UHCI, and OHCI always unconditionally set the

	 * urb->status of an isochronous endpoint to 0.

	 */

	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)

		status = 0;

	usb_hcd_giveback_urb(bus_to_hcd(urb->dev->bus), urb, status);

	spin_lock(&xhci->lock);

}



static void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci,

		struct xhci_ring *ring, struct xhci_td *td)

{
@@ -2200,9 +2230,7 @@ static int handle_tx_event(struct xhci_hcd *xhci, 
	dma_addr_t ep_trb_dma;

	struct xhci_segment *ep_seg;

	union xhci_trb *ep_trb;

	struct urb *urb = NULL;

	int status = -EINPROGRESS;

	struct urb_priv *urb_priv;

	struct xhci_ep_ctx *ep_ctx;

	struct list_head *tmp;

	u32 trb_comp_code;
@@ -2497,33 +2525,8 @@ static int handle_tx_event(struct xhci_hcd *xhci, 
		if (!handling_skipped_tds)

			inc_deq(xhci, xhci->event_ring);



		if (ret) {

			urb = td->urb;

			urb_priv = urb->hcpriv;



			xhci_urb_free_priv(urb_priv);



			usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb);

			if ((urb->actual_length != urb->transfer_buffer_length &&

						(urb->transfer_flags &

						 URB_SHORT_NOT_OK)) ||

					(status != 0 &&

					 !usb_endpoint_xfer_isoc(&urb->ep->desc)))

				xhci_dbg(xhci, "Giveback URB %p, len = %d, "

						"expected = %d, status = %d\n",

						urb, urb->actual_length,

						urb->transfer_buffer_length,

						status);

			spin_unlock(&xhci->lock);

			/* EHCI, UHCI, and OHCI always unconditionally set the

			 * urb->status of an isochronous endpoint to 0.

			 */

			if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)

				status = 0;

			usb_hcd_giveback_urb(bus_to_hcd(urb->dev->bus), urb, status);

			spin_lock(&xhci->lock);

		}



		if (ret)

			xhci_giveback_urb_locked(xhci, td, status);

	/*

	 * If ep->skip is set, it means there are missed tds on the

	 * endpoint ring need to take care of.