linux-kernel - Re: [PATCH v9 2/2] PCI: hip: Add handling of HiSilicon HIP PCIe controller errors

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Date:   Wed, 17 Jun 2020 12:01:11 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Shiju Jose <shiju.jose@...wei.com>, linux-acpi@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        rjw@...ysocki.net, bp@...en8.de, james.morse@....com,
        lenb@...nel.org, tony.luck@...el.com, dan.carpenter@...cle.com,
        zhangliguang@...ux.alibaba.com, wangkefeng.wang@...wei.com,
        jroedel@...e.de, yangyicong@...ilicon.com,
        jonathan.cameron@...wei.com, tanxiaofei@...wei.com
Subject: Re: [PATCH v9 2/2] PCI: hip: Add handling of HiSilicon HIP PCIe
 controller errors

On Tue, Jun 16, 2020 at 06:20:19PM -0500, Bjorn Helgaas wrote:
> On Mon, Jun 15, 2020 at 11:15:52AM +0100, Shiju Jose wrote:
> > From: Yicong Yang <yangyicong@...ilicon.com>

> > +	if (!guid_equal((guid_t *)gdata->section_type, &hisi_pcie_sec_type) ||
> > +	    error_data->socket_id != socket)
> > +		return NOTIFY_DONE;
> 
> I think you have to verify the GUID first before you can even safely
> extract a struct hisi_pcie_error_private from the payload:
> 
>   if (!guid_equal(...))
>     return NOTIFY_DONE;

I just also noticed the ugly cast there.

So, please import GUID first (import_guid() I think is what you need).

-- 
With Best Regards,
Andy Shevchenko