[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20151202093310.GE10207@awelinux>
Date: Wed, 2 Dec 2015 10:33:10 +0100
From: Andreas Werner <andreas.werner@....de>
To: Tejun Heo <tj@...nel.org>
CC: Andreas Werner <andreas.werner@....de>,
<linux-kernel@...r.kernel.org>, <linux-ide@...r.kernel.org>,
Hannes Reinecke <hare@...e.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: libata-core: devslp fails on ATP mSATA
On Tue, Dec 01, 2015 at 02:04:10PM -0500, Tejun Heo wrote:
> On Tue, Dec 01, 2015 at 11:17:15AM -0500, Tejun Heo wrote:
> > So, I suppose this is a fallout from 9faa643855df ("libata: use
> > READ_LOG_DMA_EXT"). The description just says "we should try use it"
> > but is there any benefit from using NCQ variant of read log page? I
> > mean, it's used during config and error handling, so it's not like
> > queueing is gonna help anything. It ends up issuing NCQ commands on
> > controllers which don't support NCQ and causes failures on devices
> > which lie about supporting the feature.
>
> Hmmm... so, the controller locks up on READ_LOG_EXT issued as pio?
> That's just weird. I suppose you can blacklist the controller so that
> any attempt to read the log page fails without actually issuing the
> command.
>
> Thanks.
>
> --
> tejun
Hi,
yes since i am using 3.14 where the READ_LOG_DMA_EXT is not it, it
seems that the controller locks up even on READ_LOG_EXT as PIO.
I have checked the current ERRATA sheet of the CPU but there
are no issues regarding this problem.
Test on a Freescale T4240 show the same behaviour as on P1013/P1022.
It seems that some FSL Cpus are affected.
I have asked my FAE at Freescale if he has some information about
that kind of issue.
Blacklisting the controller would be a solution yes, but I just
wanna wait the answer from the FAE to be sure we really have a
problem.
What kind of identifier can I use for blacklisting? The driver name
from the host driver? (fsl-sata) I did not find any register
in the sata controller to read out an ID.
Regards
Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists