On Thu, Nov 29, 2018 at 07:28:10AM +0000, Cherian, George wrote: > From: "Cherian, George" <George.Cherian@xxxxxxxxxx> > > commit 11644a7659529730eaf2f166efaabe7c3dc7af8c upstream > > Implement workaround for ThunderX2 Errata-129 (documented in > CN99XX Known Issues" available at Cavium support site). > As per ThunderX2errata-129, USB 2 device may come up as USB 1 > if a connection to a USB 1 device is followed by another connection to > a USB 2 device, the link will come up as USB 1 for the USB 2 device. > > Resolution: Reset the PHY after the USB 1 device is disconnected. > The PHY reset sequence is done using private registers in XHCI register > space. After the PHY is reset we check for the PLL lock status and retry > the operation if it fails. From our tests, retrying 4 times is sufficient. > > Add a new quirk flag XHCI_RESET_PLL_ON_DISCONNECT to invoke the workaround > in handle_xhci_port_status(). > > Cc: stable@xxxxxxxxxxxxxxx > Cc: stable@xxxxxxxxxxxxxxx # 4.14.x: 36b6857: xhci: Allow more than 32 quirks > Signed-off-by: George Cherian <george.cherian@xxxxxxxxxx> > Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > --- > There is a conflict while cherry-pick of 36b6857: xhci: Allow more than > 32 quirks. It is trivial to resolve. Let me know in case if it is an > issue. I fixed it up, thanks. greg k-h
