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Revert parts of r245132 and r245175. We don't need to write to the

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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 <johannes@brilliantservice.co.jp>

MFC after:	1 week
This commit is contained in:
Hans Petter Selasky 2013-09-07 10:42:00 +00:00
parent af85e9b0c4
commit c6fe3731df
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=255356
1 changed files with 0 additions and 10 deletions
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10
sys/dev/usb/controller/xhci.c
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@ -1480,7 +1480,6 @@ void
xhci_interrupt(struct xhci_softc *sc)
{
uint32_t status;
uint32_t iman;
USB_BUS_LOCK(&sc->sc_bus);
@ -1495,15 +1494,6 @@ 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);
}