From: Andiry Xu Date: Thu, 5 May 2011 10:14:05 +0000 (+0800) Subject: xHCI 1.0: TT_THINK_TIME set X-Git-Tag: v3.0-rc1~337^2~50^2~1 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=700b41736c07f357df0a1b8f342fd237f365b58d;p=~shefty%2Frdma-dev.git xHCI 1.0: TT_THINK_TIME set xHCI 1.0 spec says the TT Think Time field shall be set to zero if the device is not a High-speed hub. Signed-off-by: Andiry Xu Signed-off-by: Sarah Sharp --- diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 6864759c8d1..3abf33223b1 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -2699,11 +2699,16 @@ int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, /* Set TT think time - convert from ns to FS bit times. * 0 = 8 FS bit times, 1 = 16 FS bit times, * 2 = 24 FS bit times, 3 = 32 FS bit times. + * + * xHCI 1.0: this field shall be 0 if the device is not a + * High-spped hub. */ think_time = tt->think_time; if (think_time != 0) think_time = (think_time / 666) - 1; - slot_ctx->tt_info |= cpu_to_le32(TT_THINK_TIME(think_time)); + if (xhci->hci_version < 0x100 || hdev->speed == USB_SPEED_HIGH) + slot_ctx->tt_info |= + cpu_to_le32(TT_THINK_TIME(think_time)); } else { xhci_dbg(xhci, "xHCI version %x doesn't need hub " "TT think time or number of ports\n",