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Re: [PATCH] libata: disable forced PORTS_IMPL for >= v3.0 controllers

From Andy Lutomirski <luto@amacapital.net>
Newsgroups linux.kernel
Subject Re: [PATCH] libata: disable forced PORTS_IMPL for >= v3.0 controllers
Date 2016-01-15 02:10 +0100
Message-ID <qR13R-73x-11@gated-at.bofh.it> (permalink)
References <qQnzs-4iP-11@gated-at.bofh.it> <qQYIG-5f6-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Thu, Jan 14, 2016 at 2:37 PM, Tejun Heo <tj@kernel.org> wrote:
> Some early controllers incorrectly reported zero ports in PORTS_IMPL
> register and the ahci driver fabricates PORTS_IMPL from the number of
> ports in those cases.  This hasn't mattered but with the new nvme
> controllers there are cases where zero PORTS_IMPL is valid and should
> be honored.
>
> Disable the workaround for controllers >= v3.0.

I still see:

[  +0.001350] ahci 0000:00:17.0: version 3.0
[  +0.000034] ahci 0000:00:17.0: forcing PORTS_IMPL to 0xff

My "vers" is 0x10301.

--Andy

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Thread

Unhappy ahci controller on Dell XPS 13 9350 Andy Lutomirski <luto@amacapital.net> - 2016-01-13 08:00 +0100
  Re: Unhappy ahci controller on Dell XPS 13 9350 Tejun Heo <tj@kernel.org> - 2016-01-14 23:20 +0100
  [PATCH] libata: disable forced PORTS_IMPL for >= v3.0 controllers Tejun Heo <tj@kernel.org> - 2016-01-14 23:40 +0100
    Re: [PATCH] libata: disable forced PORTS_IMPL for >= v3.0 controllers Andy Lutomirski <luto@amacapital.net> - 2016-01-15 02:10 +0100
      Re: [PATCH] libata: disable forced PORTS_IMPL for >= v3.0 controllers Tejun Heo <tj@kernel.org> - 2016-01-15 20:50 +0100
    [PATCH v2] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Tejun Heo <tj@kernel.org> - 2016-01-15 21:20 +0100
      Re: [PATCH v2] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Andy Lutomirski <luto@amacapital.net> - 2016-01-15 23:50 +0100
      Re: [PATCH v2] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-01-16 11:10 +0100
        Re: [PATCH v2] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Tejun Heo <tj@kernel.org> - 2016-01-19 18:30 +0100
          Re: [PATCH v2] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2016-01-19 18:30 +0100
      [PATCH v3] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Tejun Heo <tj@kernel.org> - 2016-01-25 21:50 +0100

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