xhci: Modify check for TT info.
Commit d199c96d
by Alan Stern ensured that low speed and full speed
devices below a high speed hub without a transaction translator (TT) would
never get enumerated. Simplify the check for a TT in the xHCI virtual
device allocation to only check if the usb_device references a parent's
TT.
Make sure not to set the TT information on LS/FS devices directly
connected to the roothub. The xHCI host doesn't really have a TT, and the
host will throw an error when those virtual device TT fields are set for a
device connected to the roothub. We need this check because the xHCI
driver will shortly register two roothubs: a USB 2.0 roothub and a USB 3.0
roothub.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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1 changed files with 2 additions and 3 deletions
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@ -870,9 +870,8 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
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dev->port = top_dev->portnum;
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xhci_dbg(xhci, "Set root hub portnum to %d\n", top_dev->portnum);
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/* Is this a LS/FS device under a HS hub? */
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if ((udev->speed == USB_SPEED_LOW || udev->speed == USB_SPEED_FULL) &&
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udev->tt) {
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/* Is this a LS/FS device under an external HS hub? */
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if (udev->tt && udev->tt->hub->parent) {
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slot_ctx->tt_info = udev->tt->hub->slot_id;
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slot_ctx->tt_info |= udev->ttport << 8;
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if (udev->tt->multi)
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