2011-02-01 20:43:01

by Doug Warzecha

[permalink] [raw]
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 <[email protected]>

Acked-by: Doug Warzecha <[email protected]>