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xhci: generate a Transfer Event for each Transfer TRB with the IOC bit set

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Merge remote-tracking branch 'remotes/kraxel/tags/pull-usb-20150303-1' into staging

xhci: generate a Transfer Event for each Transfer TRB with the IOC bit set

# gpg: Signature made Tue Mar  3 07:38:43 2015 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-usb-20150303-1:
  xhci: generate a Transfer Event for each Transfer TRB with the IOC bit set

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2015-03-08 07:33:45 +00:00
commit b6d527fbc0
1 changed files with 12 additions and 3 deletions
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15
hw/usb/hcd-xhci.c
View File

@ -1767,9 +1767,18 @@ static void xhci_xfer_report(XHCITransfer *xfer)
break;
}
if (!reported && ((trb->control & TRB_TR_IOC) ||
(shortpkt && (trb->control & TRB_TR_ISP)) ||
(xfer->status != CC_SUCCESS && left == 0))) {
/*
* XHCI 1.1, 4.11.3.1 Transfer Event TRB -- "each Transfer TRB
* encountered with its IOC flag set to '1' shall generate a Transfer
* Event."
*
* Otherwise, longer transfers can have multiple data TRBs (for scatter
* gather). Short transfers and errors should be reported once per
* transfer only.
*/
if ((trb->control & TRB_TR_IOC) ||
(!reported && ((shortpkt && (trb->control & TRB_TR_ISP)) ||
(xfer->status != CC_SUCCESS && left == 0)))) {
event.slotid = xfer->slotid;
event.epid = xfer->epid;
event.length = (trb->status & 0x1ffff) - chunk;