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| author | hselasky <hselasky@FreeBSD.org> | 2014-04-29 05:45:17 +0000 |
|---|---|---|
| committer | hselasky <hselasky@FreeBSD.org> | 2014-04-29 05:45:17 +0000 |
| commit | 65035c2d373a589bbcff4d0443d3615d615ccd9d (patch) | |
| tree | 7fcc711ab1e6040d99688811f055987678764693 /sys/dev/usb/controller/xhci.c | |
| parent | ac8b74dc0a6bf777cf79664b8a8acbdfc1f2e4e5 (diff) | |
| download | FreeBSD-src-65035c2d373a589bbcff4d0443d3615d615ccd9d.zip FreeBSD-src-65035c2d373a589bbcff4d0443d3615d615ccd9d.tar.gz | |
MFC r265015:
Setting the IMOD value below 0x3F8 can cause IRQ lockups in the Intel
LynxPoint USB 3.0 controllers found in MacBookPro 2013's.
Diffstat (limited to 'sys/dev/usb/controller/xhci.c')
| -rw-r--r-- | sys/dev/usb/controller/xhci.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/dev/usb/controller/xhci.c b/sys/dev/usb/controller/xhci.c index 86f4f9b..2edad33 100644 --- a/sys/dev/usb/controller/xhci.c +++ b/sys/dev/usb/controller/xhci.c @@ -495,8 +495,12 @@ xhci_start_controller(struct xhci_softc *sc) XWRITE4(sc, runt, XHCI_ERSTSZ(0), XHCI_ERSTS_SET(temp)); + /* Check if we should use the default IMOD value */ + if (sc->sc_imod_default == 0) + sc->sc_imod_default = XHCI_IMOD_DEFAULT; + /* Setup interrupt rate */ - XWRITE4(sc, runt, XHCI_IMOD(0), XHCI_IMOD_DEFAULT); + XWRITE4(sc, runt, XHCI_IMOD(0), sc->sc_imod_default); usbd_get_page(&sc->sc_hw.root_pc, 0, &buf_res); |
