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usb: host: xhci: introduce xhci_td_cleanup()

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By extracting xhci_td_cleanup() from finish_td(), code before clearer
and easier to follow.

There are no functional changes with this patch. It's merely a cleanup.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Felipe Balbi 2017-01-23 14:20:11 +02:00 committed by Greg Kroah-Hartman
parent be0f50c2e3
commit 55fa4396b2
1 changed files with 50 additions and 42 deletions
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92
drivers/usb/host/xhci-ring.c
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@ -1822,6 +1822,55 @@ int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code)
return 0;
}
static int xhci_td_cleanup(struct xhci_hcd *xhci, struct xhci_td *td,
struct xhci_ring *ep_ring, int *status)
{
struct urb_priv *urb_priv;
struct urb *urb = NULL;
/* Clean up the endpoint's TD list */
urb = td->urb;
urb_priv = urb->hcpriv;
/* if a bounce buffer was used to align this td then unmap it */
if (td->bounce_seg)
xhci_unmap_td_bounce_buffer(xhci, ep_ring, td);
/* Do one last check of the actual transfer length.
* If the host controller said we transferred more data than the buffer
* length, urb->actual_length will be a very big number (since it's
* unsigned). Play it safe and say we didn't transfer anything.
*/
if (urb->actual_length > urb->transfer_buffer_length) {
xhci_warn(xhci, "URB req %u and actual %u transfer length mismatch\n",
urb->transfer_buffer_length, urb->actual_length);
urb->actual_length = 0;
*status = 0;
}
list_del_init(&td->td_list);
/* Was this TD slated to be cancelled but completed anyway? */
if (!list_empty(&td->cancelled_td_list))
list_del_init(&td->cancelled_td_list);
inc_td_cnt(urb);
/* Giveback the urb when all the tds are completed */
if (last_td_in_urb(td)) {
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);
/* set isoc urb status to 0 just as EHCI, UHCI, and OHCI */
if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
*status = 0;
xhci_giveback_urb_in_irq(xhci, td, *status);
}
return 0;
}
static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
union xhci_trb *ep_trb, struct xhci_transfer_event *event,
struct xhci_virt_ep *ep, int *status, bool skip)
@ -1829,8 +1878,6 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
struct xhci_virt_device *xdev;
struct xhci_ep_ctx *ep_ctx;
struct xhci_ring *ep_ring;
struct urb_priv *urb_priv;
struct urb *urb = NULL;
unsigned int slot_id;
u32 trb_comp_code;
int ep_index;
@ -1873,46 +1920,7 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
}
td_cleanup:
/* Clean up the endpoint's TD list */
urb = td->urb;
urb_priv = urb->hcpriv;
/* if a bounce buffer was used to align this td then unmap it */
if (td->bounce_seg)
xhci_unmap_td_bounce_buffer(xhci, ep_ring, td);
/* Do one last check of the actual transfer length.
* If the host controller said we transferred more data than the buffer
* length, urb->actual_length will be a very big number (since it's
* unsigned). Play it safe and say we didn't transfer anything.
*/
if (urb->actual_length > urb->transfer_buffer_length) {
xhci_warn(xhci, "URB req %u and actual %u transfer length mismatch\n",
urb->transfer_buffer_length, urb->actual_length);
urb->actual_length = 0;
*status = 0;
}
list_del_init(&td->td_list);
/* Was this TD slated to be cancelled but completed anyway? */
if (!list_empty(&td->cancelled_td_list))
list_del_init(&td->cancelled_td_list);
inc_td_cnt(urb);
/* Giveback the urb when all the tds are completed */
if (last_td_in_urb(td)) {
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);
/* set isoc urb status to 0 just as EHCI, UHCI, and OHCI */
if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
*status = 0;
xhci_giveback_urb_in_irq(xhci, td, *status);
}
return 0;
return xhci_td_cleanup(xhci, td, ep_ring, status);
}
/* sum trb lengths from ring dequeue up to stop_trb, _excluding_ stop_trb */