linux-kernel - Re: sata_mv port lockup on hotplug (kernel 2.6.38.2)

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Date:	Wed, 6 Apr 2011 23:00:21 +0200
From:	Alejandro Riveira Fernández 
	<ariveira@...il.com>
To:	Bruce Stenning <b.stenning@...igovision.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org
Subject: Re: sata_mv port lockup on hotplug (kernel 2.6.38.2)

El Wed, 6 Apr 2011 15:57:06 +0100
Bruce Stenning <b.stenning@...igovision.com> escribió:


 Just CCing linux-ide

> Please accept my most humble apologies for the lack of line breaks in
> my previous email.  Here it is again, this time in a more readable
> format:
> 
> Hello,
> 
> We have a bespoke platform utilising a Marvell MV88SX6041 SATA controller
> on which we have been running Linux 2.6.26 and using the sata_mv driver.
> 
> We have noticed problems with SATA ports occasionally locking up (on
> hotplug events) and remaining unresponsive.  The normal kernel logging
> that occurs on hotplug events is no longer emitted for the locked ports
> (but will be emitted for the other sata ports that have not exhibited
> the problem.)  The disks attached to the locked ports are completely
> unresponsive.  The condition can be cleared by removing the sata_mv
> kernel module from memory and reloading it, after which the kernel
> logging becomes active (and the disks are usable) for all ports.
> 
> The following changeset was seen as a strong candidate for addressing
> this problem:
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=933cb8e5fcdebd4b666165e3f039f814d62b0e52
> 
> We are now in the process of upgrading to the stable 2.6.38.2 kernel
> release, but initial testing of this on our platform exhibits the same
> hotplug behaviour.  Hotplug is possible, but occasionally the ports
> will lock up and not be responsive until sata_mv is removed and
> reinstalled.  Other than this, the new kernel and driver seem to be
> operating normally.
> 
> Has this problem been observed elsewhere with kernels that include the
> above patch?  Please CC me in replies.
> 
> Kind Regards,
> 
> Bruce Stenning,
> IndigoVision,
> b <dot> stenning <at> indigovision <dot> com
> 
> 
> Latest News at: http://www.indigovision.com/news2011.php
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