linux-kernel - Re: [RFC PATCH] usb, PCI: split quirk for usb host controller to three

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Date:	Thu, 1 Mar 2012 09:45:44 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-usb@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] usb, PCI: split quirk for usb host controller to three

On Thu, Mar 1, 2012 at 9:24 AM, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
> On Thu, Mar 01, 2012 at 09:17:07AM -0800, Yinghai Lu wrote:
>> so we avoid checking class again and again in that quirk.
>>
>> need to be applied after pci/linux-next and usb/usb-next
>
> As those are two independant trees, this needs to wait until after
> 3.4-rc1 is out.

ok.

>
>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>>
>> ---
>>  drivers/usb/host/pci-quirks.c |   42 ++++++++++++++++++++++++++++--------------
>>  1 file changed, 28 insertions(+), 14 deletions(-)
>
> Is this really helping anything here?  You added code overall :(

just make the code looks simple by removing

        if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI &&
                        pdev->class != PCI_CLASS_SERIAL_USB_OHCI &&
                        pdev->class != PCI_CLASS_SERIAL_USB_EHCI &&
                        pdev->class != PCI_CLASS_SERIAL_USB_XHCI)
                return;
...
        if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI)
   ...
        else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI)
   ...
        else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI)
    ...
        else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI)
    ...


also skip disable/enable device on non xhci controller.

Thanks

Yinghai
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