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usb: xhci: remove enq_updates and deq_updates from ring 

enq_updates and deq_updates were introduced in the first place
to check whether an xhci hardware is able to respond to trbs
enqueued in the ring. We now have trb tracers to trace every
single enqueue/dequeue trb. It's time to remove them and the
associated debugging code.

Signed-off-by: Lu Baolu <baolu.lu@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:
Lu Baolu 2017-04-07 17:57:06 +03:00 committed by Greg Kroah-Hartman
parent 74e0b5649c
commit cd12fd9f6d
4 changed files with 0 additions and 16 deletions
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8
drivers/usb/host/xhci-dbg.c
View File

@ -347,14 +347,10 @@ void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring)
ring->dequeue,
(unsigned long long)xhci_trb_virt_to_dma(ring->deq_seg,
ring->dequeue));
xhci_dbg(xhci, "Ring deq updated %u times\n",
ring->deq_updates);
xhci_dbg(xhci, "Ring enq = %p (virt), 0x%llx (dma)\n",
ring->enqueue,
(unsigned long long)xhci_trb_virt_to_dma(ring->enq_seg,
ring->enqueue));
xhci_dbg(xhci, "Ring enq updated %u times\n",
ring->enq_updates);
}
/**
@ -373,10 +369,6 @@ void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring)
struct xhci_segment *first_seg = ring->first_seg;
xhci_debug_segment(xhci, first_seg);
if (!ring->enq_updates && !ring->deq_updates) {
xhci_dbg(xhci, " Ring has not been updated\n");
return;
}
for (seg = first_seg->next; seg != first_seg; seg = seg->next)
xhci_debug_segment(xhci, seg);
}

3
drivers/usb/host/xhci-mem.c
View File

@ -315,9 +315,6 @@ static void xhci_initialize_ring_info(struct xhci_ring *ring,
* handling ring expansion, set the cycle state equal to the old ring.
*/
ring->cycle_state = cycle_state;
/* Not necessary for new rings, but needed for re-initialized rings */
ring->enq_updates = 0;
ring->deq_updates = 0;
/*
* Each segment has a link TRB, and leave an extra TRB for SW

3
drivers/usb/host/xhci-ring.c
View File

@ -167,8 +167,6 @@ static void next_trb(struct xhci_hcd *xhci,
*/
static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring)
{
ring->deq_updates++;
/* event ring doesn't have link trbs, check for last trb */
if (ring->type == TYPE_EVENT) {
if (!last_trb_on_seg(ring->deq_seg, ring->dequeue)) {
@ -226,7 +224,6 @@ static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring,
ring->num_trbs_free--;
next = ++(ring->enqueue);
ring->enq_updates++;
/* Update the dequeue pointer further if that was a link TRB */
while (trb_is_link(next)) {

2
drivers/usb/host/xhci.h
View File

@ -1566,10 +1566,8 @@ struct xhci_ring {
struct xhci_segment *last_seg;
union xhci_trb *enqueue;
struct xhci_segment *enq_seg;
unsigned int enq_updates;
union xhci_trb *dequeue;
struct xhci_segment *deq_seg;
unsigned int deq_updates;
struct list_head td_list;
/*
* Write the cycle state into the TRB cycle field to give ownership of