[4/4] xhci: Fix front USB ports on ASUS PRIME B350M-A

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Fri, Mar 09, 2018 at 11:29:20AM +0800, Kai Heng Feng wrote:
> Hi,
> 
> > On Mar 9, 2018, at 1:06 AM, Greg KH <gregkh@linuxfoundation.org> wrote:
> > 
> > On Thu, Mar 08, 2018 at 05:17:17PM +0200, Mathias Nyman wrote:
> > > From: Kai-Heng Feng <kai.heng.feng@canonical.com>
> > > 
> > > When a USB device gets plugged on ASUS PRIME B350M-A's front ports, the
> > > xHC stops working:
> > > [  549.114587] xhci_hcd 0000:02:00.0: WARN: xHC CMD_RUN timeout
> > > [  549.114608] suspend_common(): xhci_pci_suspend+0x0/0xc0 returns -110
> > > [  549.114638] xhci_hcd 0000:02:00.0: can't suspend
> > > (hcd_pci_runtime_suspend returned -110)
> > > 
> > > Delay before running xHC command CMD_RUN can workaround the issue.
> > > 
> > > Use a new quirk to make the delay only targets to the affected xHC.
> > > 
> > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> > > Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
> > > ---
> > >  drivers/usb/host/xhci-pci.c | 3 +++
> > >  drivers/usb/host/xhci.c     | 3 +++
> > >  drivers/usb/host/xhci.h     | 1 +
> > >  3 files changed, 7 insertions(+)
> > 
> > Any reason this shouldn't go to the stable kernel trees?
> 
> It would be really nice to have this in stable tree.

Great, will do so, thanks for the quick response.

greg k-h
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