linux-kernel - Re: [RESEND] [PATCH] xhci: Switch Intel Lynx Point ports to EHCI on shutdown.

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Message-ID: <20140218185417.GD7395@xanatos>
Date:	Tue, 18 Feb 2014 10:54:17 -0800
From:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
To:	Denis Turischev <denis.turischev@...pulab.co.il>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [RESEND] [PATCH] xhci: Switch Intel Lynx Point ports to EHCI on
 shutdown.

Sorry for the delay in reviewing this.  It helps me if you don't make the
patch in-reply-to a months old thread. :)  I'll take a look at this
shortly.

Sarah Sharp

On Tue, Feb 18, 2014 at 09:42:39AM +0200, Denis Turischev wrote:
> The same issue like with Panther Point chipsets. If the USB ports are
> switched to xHCI on shutdown, the xHCI host will send a spurious interrupt,
> which will wake the system. Some BIOS have work around for this, but not all.
> One example is Compulab's mini-desktop, the Intense-PC2.
> 
> The bug can be avoided if the USB ports are switched back to EHCI on
> shutdown.
> 
> Signed-off-by: Denis Turischev <denis@...pulab.co.il>
> ---
>  drivers/usb/host/xhci-pci.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 3c898c1..9233d12 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -134,6 +134,8 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
>  		 */
>  		if (pdev->subsystem_vendor == PCI_VENDOR_ID_HP)
>  			xhci->quirks |= XHCI_SPURIOUS_WAKEUP;
> +
> +		xhci->quirks |= XHCI_SPURIOUS_REBOOT;
>  	}
>  	if (pdev->vendor == PCI_VENDOR_ID_ETRON &&
>  			pdev->device == PCI_DEVICE_ID_ASROCK_P67) {
> -- 1.8.1.2
> 
> 
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