Date: Sat, 10 Jan 2009 12:21:30 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>, linux-ide@vger.kernel.org,
       Jeff Garzik <jgarzik@redhat.com>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: todays git: WARNING: at drivers/ata/libata-sff.c:1017
 ata_sff_hsm_move+0x45e/0x750()
Message-ID: <20090110122130.318cf168@lxorguk.ukuu.org.uk>
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References: <200901091334.55823.borntraeger@de.ibm.com>
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	<20090110104114.633cacd8@lxorguk.ukuu.org.uk>
	<200901101242.05203.borntraeger@de.ibm.com>
	<49688B63.5030105@ru.mvista.com>
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>    That's the typical REQUEST SENSE command with 18-byte data length.

Which means something has become horribly broken in the core libata stack.
An 18 byte inquiry would have 18 bytes as the *last* sg element. That
would therefore not trigger the WARN_ON. Someone has passed an sg list
that isn't properly terminated perhaps ?

I wonder if the pad code broke this.


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