linux-kernel - Re: [Intel-gfx] [PATCH V3 09/29] drm/i915: deprecate pci_get_bus_and

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Message-ID: <9046d23e-412d-9d9f-147f-a3bc6eea34fc@codeaurora.org>
Date:   Tue, 28 Nov 2017 11:29:44 -0500
From:   Sinan Kaya <okaya@...eaurora.org>
To:     Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc:     linux-pci@...r.kernel.org, timur@...eaurora.org,
        David Airlie <airlied@...ux.ie>, linux-arm-msm@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [Intel-gfx] [PATCH V3 09/29] drm/i915: deprecate
 pci_get_bus_and_slot()

On 11/28/2017 10:30 AM, Ville Syrjälä wrote:
>> +	dev_priv->bridge_dev =
>> +		pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 0));
> Maybe just pci_get_slot(pdev->bus, PCI_DEVFN(0, 0)) ?
> 
> I guess if we want to be pedantic we could go for:
> 
> bus = pci_find_host_bridge(pdev->bus)->bus;
> pci_get_slot(bus, PCI_DEVFN(0, 0))
> 
> but I think the GPU should always be on the root bus, so the simpler
> form should be fine.
> 

All three of these should be correct. 

I'll use pci_get_slot(pdev->bus, PCI_DEVFN(0, 0)) as you suggested.

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.