linux-kernel - Re: Linux Kernel Regression: HAPS quirk breaks PCIe on i.MX6QP

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Message-ID: <30102591E157244384E984126FC3CB4F639BF351@us01wembx1.internal.synopsys.com>
Date:   Fri, 1 Feb 2019 20:27:00 +0000
From:   Thinh Nguyen <thinh.nguyen@...opsys.com>
To:     Lukas Wunner <lukas@...ner.de>,
        Thinh Nguyen <thinh.nguyen@...opsys.com>
CC:     Bjorn Helgaas <bhelgaas@...gle.com>,
        "Lukas F. Hartmann" <lukas@...mn.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Lucas Stach" <l.stach@...gutronix.de>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        John Youn <john.youn@...opsys.com>
Subject: Re: Linux Kernel Regression: HAPS quirk breaks PCIe on i.MX6QP

Hi Lukas,

Lukas Wunner wrote:
> On Thu, Jan 31, 2019 at 11:46:23PM +0000, Thinh Nguyen wrote:
>> --- a/drivers/pci/quirks.c
>> +++ b/drivers/pci/quirks.c
>> @@ -629,6 +629,9 @@ static void quirk_synopsys_haps(struct pci_dev *pdev)
>>  {
>>         u32 class = pdev->class;
>>  
>> +       if (class != PCI_CLASS_SERIAL_USB_XHCI)
>> +               return;
>> +
>>         switch (pdev->device) {
>>         case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3:
>>         case PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI:
> Please use DECLARE_PCI_FIXUP_CLASS_HEADER() instead.

Sure. That's a better option. Can you test this with your setup?

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index b0a413f3f7ca..f46e7de9e15d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -639,8 +639,8 @@ static void quirk_synopsys_haps(struct pci_dev *pdev)
                break;
        }
 }
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SYNOPSYS, PCI_ANY_ID,
-                        quirk_synopsys_haps);
+DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_SYNOPSYS, PCI_ANY_ID,
+               PCI_CLASS_SERIAL_USB_XHCI, 0, quirk_synopsys_haps);
 
 /*
  * Let's make the southbridge information explicit instead of having to


Thanks,
Thinh