linux-kernel - Re: [PATCH v2] PCI: Check for PCIe downtraining conditions

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Date:   Fri, 1 Jun 2018 11:10:20 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     "Alex G." <mr.nuke.me@...il.com>, bhelgaas@...gle.com
Cc:     alex_gagniuc@...lteam.com, austin_bolen@...l.com,
        shyam_iyer@...l.com, keith.busch@...el.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] PCI: Check for PCIe downtraining conditions

On 6/1/2018 11:06 AM, Alex G. wrote:
> On 06/01/2018 10:03 AM, Sinan Kaya wrote:
>> On 6/1/2018 11:01 AM, Alexandru Gagniuc wrote:
>>> +	/* Multi-function PCIe share the same link/status. */
>>> +	if (PCI_FUNC(dev->devfn) != 0)
>>> +		return;
>>
>> How about virtual functions?
> 
> I have almost no clue about those. Is your concern that we might end up
> printing more than our fair share of link statuses?

Yes, struct pci_dev also has a flag called is_virtfn that you should bail out
here too. 

> 
> Alex
> 
> 


-- 
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.