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authorPeter Maydell <peter.maydell@linaro.org>2015-03-08 07:33:45 +0000
committerPeter Maydell <peter.maydell@linaro.org>2015-03-08 07:33:45 +0000
commitb6d527fbc0b64a2ba7d83623e47b05c745b88043 (patch)
tree77a9d6ffb41b0660c6e3f08dfe554823617a52e9
parentfff795ab383e2052cfef792e74a3086e12a14f14 (diff)
parentaa6857891df614c620e6e9fc4bc4af6e0e49cafd (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>
-rw-r--r--hw/usb/hcd-xhci.c15
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;