linux-kernel - Re: [PATCH 07/23] pci, dmar: Update dmar units devices list during hotplug

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Message-ID: <CAE9FiQV=G0huaJYtTEacctzwHTKCS+xK54QWLn3P3e0kz_Dg2Q@mail.gmail.com>
Date:	Fri, 9 Mar 2012 10:29:40 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>, x86 <x86@...nel.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>,
	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	iommu@...ts.linux-foundation.org
Subject: Re: [PATCH 07/23] pci, dmar: Update dmar units devices list during hotplug

On Fri, Mar 9, 2012 at 9:37 AM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
> On Fri, Mar 9, 2012 at 10:32 AM, Yinghai Lu <yinghai@...nel.org> wrote:
>> On Fri, Mar 9, 2012 at 9:25 AM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
>>>
>>> Well, it looks like you can change both save_dev_dmaru() *and*
>>> get_dev_dmaru() to take a struct pci_dev *.  I assumed that would be
>>> obvious.
>>
>> no.
>>
>> get_dev_dmaru() have to use bus/devfn to retrieve the dev pointer.
>
> I expected something like that, but all I see in the patch is this:
>
> +static void restore_dev_to_drhd(struct pci_dev *dev)
> +       drhd = get_dev_dmaru(pci_domain_nr(dev->bus), dev->bus->number,
> +                                dev->devfn, &i, &saved_dev_drhd_list);
>
> +static void restore_dev_to_atsr(struct pci_dev *dev)
> +       atsr = get_dev_dmaru(pci_domain_nr(dev->bus), dev->bus->number,
> +                                dev->devfn, &i, &saved_dev_atsr_list);
>
> In both those cases, you have the struct pci_dev *.

OK, i missed that. will update that accordingly.

Thanks

Yinghai
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