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| H A D | xhci.c | fc48a70cf14b9a211979cb4e187004d4a7a44591 Thu May 24 06:40:49 UTC 2018 Bin Meng <bmeng.cn@gmail.com> UPSTREAM: usb: xhci: Fix config fail of FS hub behind a HS hub with MTT
If a full speed hub connects to a high speed hub which supports MTT,
the MTT field of its slot context will be set to 1 when xHCI driver
setups an xHCI virtual device in xhci_setup_addressable_virt_dev().
Once usb core fetch its hub descriptor, and need to update the xHC's
internal data structures for the device, the HUB field of its slot
context will be set to 1 too, meanwhile MTT is also set before, this
will cause configure endpoint command fail. In the case, we should
clear MTT to 0 for full speed hub according to section 6.2.2.
This keeps in sync with Linux kernel commit:
096b110: usb: xhci: fix config fail of FS hub behind a HS hub with MTT
Change-Id: I48538e3d150f79f9bca591b0a4527cf9c5d7a2ba
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
(cherry picked from commit eaaefb066c86f08fb285e73fb8c5fbf497be6b57)
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