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https://github.com/edk2-porting/linux-next.git
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xhci: cleanup and refactor td_to_noop()
No functional changes but a few debugging outputs removed Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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0d58a1a047
@ -514,54 +514,32 @@ void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
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* of this TD.) This is used to remove partially enqueued isoc TDs from a ring.
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*/
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static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
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struct xhci_td *cur_td, bool flip_cycle)
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struct xhci_td *td, bool flip_cycle)
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{
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struct xhci_segment *cur_seg;
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union xhci_trb *cur_trb;
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struct xhci_segment *seg = td->start_seg;
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union xhci_trb *trb = td->first_trb;
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for (cur_seg = cur_td->start_seg, cur_trb = cur_td->first_trb;
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true;
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next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
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if (trb_is_link(cur_trb)) {
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/* Unchain any chained Link TRBs, but
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* leave the pointers intact.
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*/
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cur_trb->generic.field[3] &= cpu_to_le32(~TRB_CHAIN);
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/* Flip the cycle bit (link TRBs can't be the first
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* or last TRB).
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*/
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if (flip_cycle)
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cur_trb->generic.field[3] ^=
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cpu_to_le32(TRB_CYCLE);
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xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
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"Cancel (unchain) link TRB");
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xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
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"Address = %p (0x%llx dma); "
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"in seg %p (0x%llx dma)",
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cur_trb,
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(unsigned long long)xhci_trb_virt_to_dma(cur_seg, cur_trb),
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cur_seg,
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(unsigned long long)cur_seg->dma);
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while (1) {
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if (trb_is_link(trb)) {
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/* unchain chained link TRBs */
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trb->link.control &= cpu_to_le32(~TRB_CHAIN);
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} else {
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cur_trb->generic.field[0] = 0;
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cur_trb->generic.field[1] = 0;
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cur_trb->generic.field[2] = 0;
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trb->generic.field[0] = 0;
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trb->generic.field[1] = 0;
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trb->generic.field[2] = 0;
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/* Preserve only the cycle bit of this TRB */
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cur_trb->generic.field[3] &= cpu_to_le32(TRB_CYCLE);
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/* Flip the cycle bit except on the first or last TRB */
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if (flip_cycle && cur_trb != cur_td->first_trb &&
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cur_trb != cur_td->last_trb)
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cur_trb->generic.field[3] ^=
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cpu_to_le32(TRB_CYCLE);
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cur_trb->generic.field[3] |= cpu_to_le32(
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trb->generic.field[3] &= cpu_to_le32(TRB_CYCLE);
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trb->generic.field[3] |= cpu_to_le32(
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TRB_TYPE(TRB_TR_NOOP));
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xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
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"TRB to noop at offset 0x%llx",
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(unsigned long long)
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xhci_trb_virt_to_dma(cur_seg, cur_trb));
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}
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if (cur_trb == cur_td->last_trb)
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/* flip cycle if asked to */
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if (flip_cycle && trb != td->first_trb && trb != td->last_trb)
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trb->generic.field[3] ^= cpu_to_le32(TRB_CYCLE);
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if (trb == td->last_trb)
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break;
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next_trb(xhci, ep_ring, &seg, &trb);
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}
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}
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