diff options
| author | Patrick Wildt <patrick@cvs.openbsd.org> | 2019-11-28 21:49:42 +0000 |
|---|---|---|
| committer | Patrick Wildt <patrick@cvs.openbsd.org> | 2019-11-28 21:49:42 +0000 |
| commit | 2b5f0a37935e0f3f2833d748729effb8cbb0ec93 (patch) | |
| tree | 3bb354a8b302c6742b8bafcc00807580219d3128 /sys/dev/usb | |
| parent | 5a53f4773ce46091d0875634196c68c53b396a89 (diff) | |
On short transfers with multiple TRBs in a TD we get two events.
One on the TRB that went short, and one for the last TRB in a TD.
We already set actlen only once so that the last TRB in a TD does
not override it, but some controllers throw another short event
instead of a success event, so we have to add the same check there
as well.
ok gerhard@ mglocker@
Diffstat (limited to 'sys/dev/usb')
| -rw-r--r-- | sys/dev/usb/xhci.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sys/dev/usb/xhci.c b/sys/dev/usb/xhci.c index 064235b2841..5ee346c9f17 100644 --- a/sys/dev/usb/xhci.c +++ b/sys/dev/usb/xhci.c @@ -1,4 +1,4 @@ -/* $OpenBSD: xhci.c,v 1.108 2019/11/18 20:25:49 mglocker Exp $ */ +/* $OpenBSD: xhci.c,v 1.109 2019/11/28 21:49:41 patrick Exp $ */ /* * Copyright (c) 2014-2015 Martin Pieuchot @@ -856,8 +856,9 @@ xhci_event_xfer_generic(struct xhci_softc *sc, struct usbd_xfer *xfer, /* * Use values from the transfer TRB instead of the status TRB. */ - xfer->actlen = xhci_xfer_length_generic(xx, xp, trb_idx) - - remain; + if (xfer->actlen == 0) + xfer->actlen = + xhci_xfer_length_generic(xx, xp, trb_idx) - remain; /* * If this is not the last TRB of a transfer, we should * theoretically clear the IOC at the end of the chain |