From: James Bottomley <James.Bottomley@SteelEye.com>
To: SCSI Mailing List <linux-scsi@vger.kernel.org>
Subject: Re: [PATCH] aic7xxx: upport all sequencer and core fixes from adaptec version 6.3.9
Date: Fri, 05 Aug 2005 13:16:12 -0500 [thread overview]
Message-ID: <1123265773.5003.50.camel@mulgrave> (raw)
In-Reply-To: <42F368DD.504@vger.kernel.org>
On Fri, 2005-08-05 at 09:25 -0400, SCSI Mailing List wrote:
> Tremendously good work!
Thanks. There's unfortunately still an outstanding problem I can't fix.
It seems that after a certain number of repetitions of a failing
command, the entire card locks up and the sequencer always returns
SAM_STAT_BUSY to any new commands. This is a bit of a problem for the
scsi mid-layer because it blindly always retries SAM_STAT_BUSY and
SAM_STAT_QUEUE_FULL. The only way to recover from this is to issue a
bus reset.
This condition, I think, is what causes some of the hang reports about
this driver. However, I think I see the code in the sequencer which is
causing it (target_cmdphase) but I don't have enough information about
the sequencer to fix this.
James
prev parent reply other threads:[~2005-08-05 18:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-04 22:33 [PATCH] aic7xxx: upport all sequencer and core fixes from adaptec version 6.3.9 James Bottomley
2005-08-05 13:25 ` SCSI Mailing List
2005-08-05 18:16 ` James Bottomley [this message]
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