OpenCloudOS-Kernel/drivers/virtio
Michael S. Tsirkin b03214d559 virtio-pci: disable msi at startup
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@redhat.com>
Tested-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
2010-06-23 22:49:07 +09:30
..
Kconfig virtio: balloon driver 2008-02-04 23:50:13 +11:00
Makefile virtio: balloon driver 2008-02-04 23:50:13 +11:00
config.c Virtio interface 2007-10-23 15:49:54 +10:00
virtio.c virtio: enhance id_matching for virtio drivers 2009-06-12 22:16:40 +09:30
virtio_balloon.c virtio_balloon: use virtqueue_xxx wrappers 2010-05-19 22:15:41 +09:30
virtio_pci.c virtio-pci: disable msi at startup 2010-06-23 22:49:07 +09:30
virtio_ring.c virtio: return ENOMEM on out of memory 2010-06-23 22:49:06 +09:30