linux-kernel - Re: [PATCH 1/1] xhci: Recognize USB 3.0 devices as superspeed at powerup

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Message-ID: <CAOvWMLa9XPXh2f=d6XSXMLJC6Ljd=fEAFhm1HKr4pcg38+MRjg@mail.gmail.com>
Date:	Sat, 25 Aug 2012 15:12:14 +0800
From:	Andiry Xu <andiry@...il.com>
To:	manoj.iyer@...onical.com
Cc:	linux-kernel@...r.kernel.org, sarah.a.sharp@...ux.intel.com,
	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 1/1] xhci: Recognize USB 3.0 devices as superspeed at powerup

On Thu, Aug 23, 2012 at 12:53 AM,  <manoj.iyer@...onical.com> wrote:
> From: Manoj Iyer <manoj.iyer@...onical.com>
>
> On Intel Panther Point chipset USB 3.0 devices show up as
> high-speed devices on powerup, but after an s3 cycle they are
> correctly recognized as SuperSpeed. At powerup switch the port
> to xHCI so that USB 3.0 devices are correctly recognized.
>
> BugLink: http://bugs.launchpad.net/bugs/1000424
>
> Signed-off-by: Manoj Iyer <manoj.iyer@...onical.com>

This one looks OK to me.

Thanks,
Andiry

> ---
>  drivers/usb/host/pci-quirks.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
> index c5e9e4a..486e812 100644
> --- a/drivers/usb/host/pci-quirks.c
> +++ b/drivers/usb/host/pci-quirks.c
> @@ -870,9 +870,10 @@ static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev)
>         /* Disable any BIOS SMIs and clear all SMI events*/
>         writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
>
> +hc_init:
>         if (usb_is_intel_switchable_xhci(pdev))
>                 usb_enable_xhci_ports(pdev);
> -hc_init:
> +
>         op_reg_base = base + XHCI_HC_LENGTH(readl(base));
>
>         /* Wait for the host controller to be ready before writing any
> --
> 1.7.9.5
>
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