From: Tejun Heo <htejun@gmail.com>
To: Chuck Ebbert <cebbert@redhat.com>
Cc: IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Re: AHCI driver prints "D2H reg with I during NCQ" message, what is it?
Date: Sat, 14 Jul 2007 13:12:22 +0900 [thread overview]
Message-ID: <46984D26.5080807@gmail.com> (raw)
In-Reply-To: <46979A3A.2090005@redhat.com>
Chuck Ebbert wrote:
> I see this on boot with kernels 2.6.22.1 and 2.6.20.15:
>
> ata1: D2H reg with I during NCQ, this message won't be printed again
>
> But I can't find anything that tells me what it means, or whether
> it's a real problem.
That's your firmware transmitting unnecessary D2H Reg FIS during NCQ
command phase. It's minor protocol violation which can be ignored. No
need to worry.
--
tejun
prev parent reply other threads:[~2007-07-14 4:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-13 15:28 AHCI driver prints "D2H reg with I during NCQ" message, what is it? Chuck Ebbert
2007-07-14 4:12 ` Tejun Heo [this message]
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