linux-kernel - Re: [PATCH v10 3/5] usb: xhci: Add support for Renesas controller with memory

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Message-ID: <2cf10102-7529-6543-476a-e99730772c64@linux.intel.com>
Date:   Thu, 30 Apr 2020 11:16:49 +0300
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Christian Lamparter <chunkeey@...glemail.com>,
        John Stultz <john.stultz@...aro.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Andreas Böhler <dev@...ehler.at>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 3/5] usb: xhci: Add support for Renesas controller
 with memory

On 30.4.2020 9.20, Vinod Koul wrote:
> On 29-04-20, 19:58, Vinod Koul wrote:
>> On 29-04-20, 16:53, Mathias Nyman wrote:
>>> On 24.4.2020 13.14, Vinod Koul wrote:
> 
>>>>  	/* Prevent runtime suspending between USB-2 and USB-3 initialization */
>>>>  	pm_runtime_get_noresume(&dev->dev);
>>>> @@ -388,6 +401,9 @@ static void xhci_pci_remove(struct pci_dev *dev)
>>>>  {
>>>>  	struct xhci_hcd *xhci;
>>>>  
>>>> +	if (renesas_device)
>>>> +		renesas_xhci_pci_exit(dev);
>>>> +
>>>
>>> Ah, I see, what we really should do is make sure the quirks in the driver data get
>>> added to xhci->quirks, and then just check for the correct quirk in xhci_pci_remove.
>>
>> Ah sure that does sound better, I will update this as well and send an
>> update with these changes
> 
> This works for me.. But I have kept the code as in the xhci_pci_probe(),
> ofcourse removed bool renesas_device.

That's fine, xhci is just hcd->hcd_priv, and it doesn't exists before
usb_hcd_pci_probe() is called

usb_hcd_pci_probe()
  usb_create_hcd()
    hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL);

-Mathias