linux-kernel - Re: [PATCHv2] PCI: designware-ep: Fix the Header Type check

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Message-ID: <CAL_Jsq+TG7JD2oWGmOSJqqBQihbHr0C12cteH5EtSRLCj63Nhw@mail.gmail.com>
Date:   Tue, 18 Aug 2020 07:51:56 -0600
From:   Rob Herring <robh@...nel.org>
To:     Zhiqiang Hou <Zhiqiang.Hou@....com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        PCI <linux-pci@...r.kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>
Subject: Re: [PATCHv2] PCI: designware-ep: Fix the Header Type check

On Tue, Aug 18, 2020 at 3:35 AM Zhiqiang Hou <Zhiqiang.Hou@....com> wrote:
>
> From: Hou Zhiqiang <Zhiqiang.Hou@....com>
>
> The current check will result in the multiple function device
> fails to initialize. So fix the check by masking out the
> multiple function bit.
>
> Fixes: 0b24134f7888 ("PCI: dwc: Add validation that PCIe core is set to correct mode")
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> ---
> V2:
>  - Add marco PCI_HEADER_TYPE_MASK and print the masked value.
>
>  drivers/pci/controller/dwc/pcie-designware-ep.c | 3 ++-
>  include/uapi/linux/pci_regs.h                   | 1 +
>  2 files changed, 3 insertions(+), 1 deletion(-)

Reviewed-by: Rob Herring <robh@...nel.org>