usb: pci-quirks: Prevent Sony VAIO t-series from switching usb ports
authorMathias Nyman <mathias.nyman@linux.intel.com>
Wed, 28 May 2014 20:18:35 +0000 (23:18 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 11 Jun 2014 18:54:13 +0000 (11:54 -0700)
commitb3fe93951b249262799da15d571ea7240f323f6e
tree64361b02fd5426a2dedd8c108ee69820cc37d082
parent9a4f7fa27b70efbb95ff96cfc6c5e7d66dd6ce20
usb: pci-quirks: Prevent Sony VAIO t-series from switching usb ports

commit b38f09ccc3fd453180e96273bf3f34083c30809a upstream.

Sony VAIO t-series machines are not capable of switching usb2 ports over
from Intel EHCI to xHCI controller. If tried the USB2 port will be left
unconnected and unusable.

This patch should be backported to stable kernels as old as 3.12,
that contain the commit 26b76798e0507429506b93cd49f8c4cfdab06896
"Intel xhci: refactor EHCI/xHCI port switching"

Reported-by: Jorge <xxopxe@gmail.com>
Tested-by: Jorge <xxopxe@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/pci-quirks.c