Re: [PATCH for-2.6.35] virtio-pci: disable msi at startup

From: Jesse Barnes
Date: Thu Jun 10 2010 - 11:35:47 EST

On Thu, 10 Jun 2010 18:22:52 +0300
"Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote:

> virtio-pci resets the device at startup by writing to the status
> register, but this does not clear the pci config space,
> specifically msi enable status which affects register
> layout.
> This breaks things like kdump when they try to use e.g. virtio-blk.
> Fix by forcing msi off at startup. Since pci.c already has
> a routine to do this, we export and use it instead of duplicating code.
> Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
> Tested-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> Cc: linux-pci@xxxxxxxxxxxxxxx
> ---

Yeah, looks fine.

Acked-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>

Jesse Barnes, Intel Open Source Technology Center
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