linux-kernel - RE: [PATCH 1/1] scsi: megaraid_sas - Fix random failure of DCDBcmds with sense info

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Message-ID: <9738BCBE884FDB42801FAD8A7769C26501F69BBB@NAMAIL1.ad.lsil.com>
Date:	Mon, 25 Feb 2008 14:30:19 -0700
From:	"Yang, Bo" <Bo.Yang@....com>
To:	"James Bottomley" <James.Bottomley@...senPartnership.com>
Cc:	"Matthew Wilcox" <matthew@....cx>, <linux-scsi@...r.kernel.org>,
	<akpm@...l.org>, <linux-kernel@...r.kernel.org>,
	"Patro, Sumant" <Sumant.Patro@....com>,
	"Kolli, Neela" <Neela.Kolli@....com>
Subject: RE: [PATCH 1/1] scsi: megaraid_sas - Fix random failure of DCDBcmds with sense info

James,

Thanks for the reply.  We will resubmit the patch to rollback it to our
original implementation.

Regards.

Bo Yang

-----Original Message-----
From: James Bottomley [mailto:James.Bottomley@...senPartnership.com] 
Sent: Friday, February 22, 2008 11:36 AM
To: Yang, Bo
Cc: Matthew Wilcox; linux-scsi@...r.kernel.org; akpm@...l.org;
linux-kernel@...r.kernel.org; Patro, Sumant; Kolli, Neela
Subject: RE: [PATCH 1/1] scsi: megaraid_sas - Fix random failure of
DCDBcmds with sense info


On Fri, 2008-02-22 at 09:17 -0700, Yang, Bo wrote:
> James,
> 
> What is the status for this patch?  We need to submit more patches 
> based on the acceptance of this patch.

OK, read the thread; Matthew is right.  What you propose would pretty
much destroy compat ioctl handling within the driver.  You need a compat
handler for MEGASAS_IOC_FW.

With your current patch you'd get a failure both from a 64 bit binary
running on x86-64 and if someone ran the x86 binary on ia64.

The driver already uses the compat infrastructure, it shouldn't be too
hard to add this in the correct manner.

James


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