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

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Date:	Fri, 22 Feb 2008 10:35:31 -0600
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	"Yang, Bo" <Bo.Yang@....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 DCDB
	cmds 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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