haraldwolff/qemu-patch-raspberry4
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Revert "xhci: generate a Transfer Event for each Transfer TRB with the IOC bit set"

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This makes xhci generate multiple short packet events in case of
multi-trb transfers.  Which is wrong.  We need to fix this in a
different way.

This reverts commit aa6857891d.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-04-28 09:19:35 +02:00
parent 4e8cfbe114
commit 88dbed3f59
1 changed files with 3 additions and 12 deletions
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15
hw/usb/hcd-xhci.c
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@ -1767,18 +1767,9 @@ static void xhci_xfer_report(XHCITransfer *xfer)
break;
}
/*
* 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)))) {
if (!reported && ((trb->control & TRB_TR_IOC) ||
(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;