linux-kernel - Re: [PATCH V2] PCI: Do not enable extended tags on pre-dated (v1.x) systems

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Message-ID: <70e56020-ec7f-9752-7236-7d4157c07205@codeaurora.org>
Date:   Mon, 10 Jul 2017 21:41:39 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     linux-pci@...r.kernel.org, timur@...eaurora.org,
        wim.ten.have@...cle.com, linux-arm-msm@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V2] PCI: Do not enable extended tags on pre-dated (v1.x)
 systems

One more question:

On 7/10/2017 8:20 PM, Sinan Kaya wrote:
> Sure, I can change to blacklist. I'll not enable it unless the device is blacklisted
> via quirks.

Since the quirk is at the completer, are you OK with walking the list and clearing the
extended tags across the tree when at least one device with a quirk is found?

Would you look for another solution?

I was told that Linux assumes peer-to-peer is possible by default on another thread.

-- 
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.