linux-kernel - Re: [PATCH v2] libata: disable forced PORTS

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Message-ID: <CALCETrX6yvmkPjVKNbi2sQV7KRSVtM_3-y=9n3ybsrp=vxfjWw@mail.gmail.com>
Date:	Fri, 15 Jan 2016 14:49:10 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-ide@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] libata: disable forced PORTS_IMPL for >= AHCI 1.3

On Fri, Jan 15, 2016 at 12:13 PM, Tejun Heo <tj@...nel.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 >= AHCI 1.3.

Tested-by: Andy Lutomirski <luto@...nel.org>

--Andy