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

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Message-ID: <07E32F241046DA418A0381C1225BFC011A453F262B@AUSX7MCPS301.AMER.DELL.COM>
Date:	Tue, 18 Jan 2011 12:20:50 -0600
From:	<Stuart_Hayes@...l.com>
To:	<Douglas_Warzecha@...l.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] dcdbas: force SMI to happen when expected

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>

Download attachment "dcdbas_37_smiread.patch" of type "application/octet-stream" (520 bytes)