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Date:   Fri, 17 Jan 2020 10:31:20 -0800
From:   Michael Chan <>
To:     Marc Smith <>
Cc:     Netdev <>
Subject: Re: 5.4.12 bnxt_en: Unable do read adapter's DSN

On Fri, Jan 17, 2020 at 8:04 AM Marc Smith <> wrote:

> I'm curious though about your comment: Is there in a fact a kernel
> config option I can enable for "extended configuration space support"?
> I looked through the PCI support options in the kernel config menu on
> 5.4.x but nothing jumped out at me that sounded similar to this.

As I said, I received a similar report about this issue and they
specifically reported that PCIe extended config space was not enabled
in their kernel.  I believe it is CONFIG_PCI_MMCONFIG that will enable
access to extended config space.  It's also possible that during
kernel boot time, the MMCONFIG base address could not be determined in
their environment.


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