Author: hselasky
Date: Mon Sep 16 10:06:40 2013
New Revision: 255610
URL: http://svnweb.freebsd.org/changeset/base/255610
Log:
MFC r255356:
Revert parts of r245132 and r245175. We don't need to write to the
IMAN register to clear the pending interrupt status bits. This patch
tries to solve problems seen on the MacBook Air, as reported by
Johannes Lundberg <johan...@brilliantservice.co.jp>
Modified:
stable/8/sys/dev/usb/controller/xhci.c
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/dev/ (props changed)
stable/8/sys/dev/usb/ (props changed)
Modified: stable/8/sys/dev/usb/controller/xhci.c
==============================================================================
--- stable/8/sys/dev/usb/controller/xhci.c Mon Sep 16 10:04:19 2013
(r255609)
+++ stable/8/sys/dev/usb/controller/xhci.c Mon Sep 16 10:06:40 2013
(r255610)
@@ -1446,7 +1446,6 @@ void
xhci_interrupt(struct xhci_softc *sc)
{
uint32_t status;
- uint32_t iman;
USB_BUS_LOCK(&sc->sc_bus);
@@ -1461,15 +1460,6 @@ xhci_interrupt(struct xhci_softc *sc)
DPRINTFN(16, "real interrupt (status=0x%08x)\n", status);
if (status & XHCI_STS_EINT) {
-
- /* acknowledge pending event */
- iman = XREAD4(sc, runt, XHCI_IMAN(0));
-
- /* reset interrupt */
- XWRITE4(sc, runt, XHCI_IMAN(0), iman);
-
- DPRINTFN(16, "real interrupt (iman=0x%08x)\n", iman);
-
/* check for event(s) */
xhci_interrupt_poll(sc);
}
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