linux-kernel - Re: [PATCH v6 0/5] usb: xhci: Add support for Renesas USB controllers

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Date:   Fri, 31 Jan 2020 10:47:27 -0500 (EST)
From:   Alan Stern <stern@...land.harvard.edu>
To:     Mathias Nyman <mathias.nyman@...ux.intel.com>
cc:     Vinod Koul <vkoul@...nel.org>,
        Christian Lamparter <chunkeey@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        John Stultz <john.stultz@...aro.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        <linux-arm-msm@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        USB list <linux-usb@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: Re: [PATCH v6 0/5] usb: xhci: Add support for Renesas USB controllers

On Thu, 30 Jan 2020, Mathias Nyman wrote:

> I realize this can't be easily changed because usb_hcd_pci_probe() takes the
> pci_device_id pointer as an argument, and expects id.driver_data to be a
> HC driver pointer.
> 
> So this turns out to be a question for Greg and Alan:
> 
> Would it make sense to change usb_hcd_pci_probe() to take a HC driver pointer
> as an argument instead of a pointer to pci_device_id?
> pci_device_id pointer is only used to extract the HC driver handle.
> This way the driver_data could be used for, well, driver data.

That seems like a good idea to me.  There aren't very many drivers that 
use usb_hcd_pci_probe(); changing them all should be fairly easy.

Alan Stern