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xhci: get isochronous ring directly from endpoint structure

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[ Upstream commit d4dff8043ea5b93a30cb9b19d4407bd506a6877a ]

isochronous endpoints do not support streams, meaning that
there is only one ring per endpoint.

Avoid double-fetching the transfer event DMA to get the
ring. Also makes passing the event to skip_isoc_td() uncecessary.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210129130044.206855-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: a1575120972e ("xhci: Prevent infinite loop in transaction errors recovery for streams")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mathias Nyman
2021-01-29 15:00:19 +02:00
committed by Greg Kroah-Hartman
parent a81ace0656
commit aaaa7cc4ab
1 changed files with 6 additions and 11 deletions
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17
drivers/usb/host/xhci-ring.c
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@@ -2209,7 +2209,6 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
union xhci_trb *ep_trb, struct xhci_transfer_event *event, union xhci_trb *ep_trb, struct xhci_transfer_event *event,
struct xhci_virt_ep *ep, int *status) struct xhci_virt_ep *ep, int *status)
{ {
struct xhci_ring *ep_ring;
struct urb_priv *urb_priv; struct urb_priv *urb_priv;
int idx; int idx;
struct usb_iso_packet_descriptor *frame; struct usb_iso_packet_descriptor *frame;
@@ -2218,7 +2217,6 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
u32 remaining, requested, ep_trb_len; u32 remaining, requested, ep_trb_len;
int short_framestatus; int short_framestatus;
ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
urb_priv = td->urb->hcpriv; urb_priv = td->urb->hcpriv;
idx = urb_priv->num_tds_done; idx = urb_priv->num_tds_done;
@@ -2279,7 +2277,7 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
} }
if (sum_trbs_for_length) if (sum_trbs_for_length)
frame->actual_length = sum_trb_lengths(xhci, ep_ring, ep_trb) + frame->actual_length = sum_trb_lengths(xhci, ep->ring, ep_trb) +
ep_trb_len - remaining; ep_trb_len - remaining;
else else
frame->actual_length = requested; frame->actual_length = requested;
@@ -2290,15 +2288,12 @@ static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
} }
static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
struct xhci_transfer_event *event,
struct xhci_virt_ep *ep, int *status) struct xhci_virt_ep *ep, int *status)
{ {
struct xhci_ring *ep_ring;
struct urb_priv *urb_priv; struct urb_priv *urb_priv;
struct usb_iso_packet_descriptor *frame; struct usb_iso_packet_descriptor *frame;
int idx; int idx;
ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
urb_priv = td->urb->hcpriv; urb_priv = td->urb->hcpriv;
idx = urb_priv->num_tds_done; idx = urb_priv->num_tds_done;
frame = &td->urb->iso_frame_desc[idx]; frame = &td->urb->iso_frame_desc[idx];
@@ -2310,11 +2305,11 @@ static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
frame->actual_length = 0; frame->actual_length = 0;
/* Update ring dequeue pointer */ /* Update ring dequeue pointer */
while (ep_ring->dequeue != td->last_trb) while (ep->ring->dequeue != td->last_trb)
inc_deq(xhci, ep_ring); inc_deq(xhci, ep->ring);
inc_deq(xhci, ep_ring); inc_deq(xhci, ep->ring);
return xhci_td_cleanup(xhci, td, ep_ring, status); return xhci_td_cleanup(xhci, td, ep->ring, status);
} }
/* /*
@@ -2693,7 +2688,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
return -ESHUTDOWN; return -ESHUTDOWN;
} }
skip_isoc_td(xhci, td, event, ep, &status); skip_isoc_td(xhci, td, ep, &status);
goto cleanup; goto cleanup;
} }
if (trb_comp_code == COMP_SHORT_PACKET) if (trb_comp_code == COMP_SHORT_PACKET)