diff options
| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2013-03-18 10:19:51 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-05-30 14:35:08 +0100 |
| commit | 8ebf4043186fe8f7a275cf4e241f39105556e3ef (patch) | |
| tree | e72ba9b4167a4e9f98cdd2d88161b5f4b8584fd9 | |
| parent | 81363d1b2071e404c261b6f38265ba3b90a0c556 (diff) | |
xhci: Don't warn on empty ring for suspended devices.
commit a83d6755814e4614ba77e15d82796af0f695c6b8 upstream.
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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 37b2a89db982..d08a804267d0 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2376,14 +2376,21 @@ 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 " |