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xhci: Don't warn on empty ring for suspended devices.

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When a device attached to the roothub is suspended, the endpoint rings
are stopped.  The host may generate a completion event with the
completion code set to 'Stopped' or 'Stopped Invalid' when the ring is
halted.  The current xHCI code prints a warning in that case, which can
be really annoying if the USB device is coming into and out of suspend.

Remove the unnecessary warning.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Sarah Sharp 2013-03-18 10:19:51 -07:00
parent 1c11a172cb
commit a83d675581
1 changed files with 15 additions and 8 deletions
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23
drivers/usb/host/xhci-ring.c
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@ -2463,14 +2463,21 @@ static int handle_tx_event(struct xhci_hcd *xhci,
* TD list.
*/
if (list_empty(&ep_ring->td_list)) {
xhci_warn(xhci, "WARN Event TRB for slot %d ep %d "
"with no TDs queued?\n",
TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
ep_index);
xhci_dbg(xhci, "Event TRB with TRB type ID %u\n",
(le32_to_cpu(event->flags) &
TRB_TYPE_BITMASK)>>10);
xhci_print_trb_offsets(xhci, (union xhci_trb *) event);
/*
* A stopped endpoint may generate an extra completion
* event if the device was suspended. Don't print
* warnings.
*/
if (!(trb_comp_code == COMP_STOP ||
trb_comp_code == COMP_STOP_INVAL)) {
xhci_warn(xhci, "WARN Event TRB for slot %d ep %d with no TDs queued?\n",
TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
ep_index);
xhci_dbg(xhci, "Event TRB with TRB type ID %u\n",
(le32_to_cpu(event->flags) &
TRB_TYPE_BITMASK)>>10);
xhci_print_trb_offsets(xhci, (union xhci_trb *) event);
}
if (ep->skip) {
ep->skip = false;
xhci_dbg(xhci, "td_list is empty while skip "