linux-kernel - RE: [PATCH] dcdbas: force SMI to happen when expected

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Message-ID: <CC13D7E3DE58AE4096779C4F1D272C8E27D75C5DD1@AUSX7MCPS308.AMER.DELL.COM>
Date:	Tue, 1 Feb 2011 14:42:53 -0600
From:	<Douglas_Warzecha@...l.com>
To:	<linux-kernel@...r.kernel.org>, <Stuart_Hayes@...l.com>
Subject: RE: [PATCH] dcdbas: force SMI to happen when expected

On 01/18/2011 12:21 PM, Stuart Hayes wrote:
> The dcdbas driver can do an I/O write to cause a SMI to occur.  On some
> systems I/O writes are posted in the chipset and don't complete
> immediately.  This can result in the SMI happening at a later time.
> This can result in random failures since the SMI handler expects the
> EBX register to contain a pointer, and the handler can write to memory.
> 
> Performing an I/O read to the same address as the I/O write will force
> the I/O write to complete.  The patch is against the 2.6.37 kernel and
> has been tested.
> 
> Signed-off-by: Stuart Hayes <stuart_hayes@...l.com>

Acked-by: Doug Warzecha <douglas_warzecha@...l.com>

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