From: Tejun Heo <htejun@gmail.com>
To: Jian Peng <jipeng2005@gmail.com>
Cc: Jeff Garzik <jgarzik@pobox.com>,
linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] libata: ahci_start_engine compliant to AHCI spec
Date: Sat, 23 Apr 2011 16:40:44 +0200 [thread overview]
Message-ID: <BANLkTinYzLJAPdpNsZYuDML0eszgw00JcQ@mail.gmail.com> (raw)
In-Reply-To: <1303541890-14528-1-git-send-email-jipeng2005@gmail.com>
On Sat, Apr 23, 2011 at 8:58 AM, Jian Peng <jipeng2005@gmail.com> wrote:
> At the end of section 10.1 of AHCI spec (rev 1.3), it states
>
> Software shall not set PxCMD.ST to 1 until it is determined that
> a functoinal device is present on the port as determined by
> PxTFD.STS.BSY=0, PxTFD.STS.DRQ=0 and PxSSTS.DET=3h
>
> Even though most AHCI host controller works without this check,
> specific controller will fail under this condition.
>
> Signed-off-by: Jian Peng <jipeng2005@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
next prev parent reply other threads:[~2011-04-23 14:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-23 6:58 [PATCH 1/1] libata: ahci_start_engine compliant to AHCI spec Jian Peng
2011-04-23 7:08 ` Jeff Garzik
2011-04-23 14:40 ` Tejun Heo [this message]
2011-04-25 10:26 ` Sergei Shtylyov
-- strict thread matches above, loose matches on Subject: below --
2011-04-19 21:44 Jian Peng
2011-04-21 13:40 ` Tejun Heo
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