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usb: xhci: move process TD code out of the while loop

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This part is and should only performed once, so it's moved out of the
while loop to improve code readability.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20240626124835.1023046-19-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Niklas Neronin 2024-06-26 15:48:32 +03:00 committed by Greg Kroah-Hartman
parent 132dcf65fc
commit c43e43e8a7
1 changed files with 30 additions and 32 deletions
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62
drivers/usb/host/xhci-ring.c
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@ -2868,10 +2868,6 @@ static int handle_tx_event(struct xhci_hcd *xhci,
return -ESHUTDOWN;
}
}
if (trb_comp_code == COMP_SHORT_PACKET)
ep_ring->last_td_was_short = true;
else
ep_ring->last_td_was_short = false;
if (ep->skip) {
xhci_dbg(xhci,
@ -2880,34 +2876,6 @@ static int handle_tx_event(struct xhci_hcd *xhci,
ep->skip = false;
}
ep_trb = &ep_seg->trbs[(ep_trb_dma - ep_seg->dma) /
sizeof(*ep_trb)];
trace_xhci_handle_transfer(ep_ring,
(struct xhci_generic_trb *) ep_trb);
/*
* No-op TRB could trigger interrupts in a case where
* a URB was killed and a STALL_ERROR happens right
* after the endpoint ring stopped. Reset the halted
* endpoint. Otherwise, the endpoint remains stalled
* indefinitely.
*/
if (trb_is_noop(ep_trb)) {
if (xhci_halted_host_endpoint(ep_ctx, trb_comp_code))
xhci_handle_halted_endpoint(xhci, ep, td, EP_HARD_RESET);
} else {
td->status = status;
/* update the urb's actual_length and give back to the core */
if (usb_endpoint_xfer_control(&td->urb->ep->desc))
process_ctrl_td(xhci, ep, ep_ring, td, ep_trb, event);
else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc))
process_isoc_td(xhci, ep, ep_ring, td, ep_trb, event);
else
process_bulk_intr_td(xhci, ep, ep_ring, td, ep_trb, event);
}
/*
* If ep->skip is set, it means there are missed tds on the
* endpoint ring need to take care of.
@ -2916,6 +2884,36 @@ static int handle_tx_event(struct xhci_hcd *xhci,
*/
} while (ep->skip);
if (trb_comp_code == COMP_SHORT_PACKET)
ep_ring->last_td_was_short = true;
else
ep_ring->last_td_was_short = false;
ep_trb = &ep_seg->trbs[(ep_trb_dma - ep_seg->dma) / sizeof(*ep_trb)];
trace_xhci_handle_transfer(ep_ring, (struct xhci_generic_trb *) ep_trb);
/*
* No-op TRB could trigger interrupts in a case where a URB was killed
* and a STALL_ERROR happens right after the endpoint ring stopped.
* Reset the halted endpoint. Otherwise, the endpoint remains stalled
* indefinitely.
*/
if (trb_is_noop(ep_trb)) {
if (xhci_halted_host_endpoint(ep_ctx, trb_comp_code))
xhci_handle_halted_endpoint(xhci, ep, td, EP_HARD_RESET);
} else {
td->status = status;
/* update the urb's actual_length and give back to the core */
if (usb_endpoint_xfer_control(&td->urb->ep->desc))
process_ctrl_td(xhci, ep, ep_ring, td, ep_trb, event);
else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc))
process_isoc_td(xhci, ep, ep_ring, td, ep_trb, event);
else
process_bulk_intr_td(xhci, ep, ep_ring, td, ep_trb, event);
}
return 0;
err_out: