diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2015-03-08 07:33:45 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2015-03-08 07:33:45 +0000 |
| commit | b6d527fbc0b64a2ba7d83623e47b05c745b88043 (patch) | |
| tree | 77a9d6ffb41b0660c6e3f08dfe554823617a52e9 /hw | |
| parent | fff795ab383e2052cfef792e74a3086e12a14f14 (diff) | |
| parent | aa6857891df614c620e6e9fc4bc4af6e0e49cafd (diff) | |
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>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/usb/hcd-xhci.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index 776699b44e..828c2a7d78 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -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; |