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SubjectRe: Linux Kernel Regression: HAPS quirk breaks PCIe on i.MX6QP
On Fri, Feb 01, 2019 at 08:27:00PM +0000, Thinh Nguyen wrote:
> 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
>
>

Can we get a formal patch, including details about the issue (I assume
Synopsys released two different parts with Device ID 0xabcd) and a
signed-off-by?

I'd like to get this into for-linus as soon as possible for v5.0.

Bjorn

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