From: Michael S. Tsirkin Date: Tue, 13 Jun 2017 17:56:44 +0000 (+0300) Subject: virtio_balloon: disable VIOMMU support X-Git-Tag: v4.14-rc1~714^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e41b1355508debe45fda33ef8c03ff3ba5d206b9;p=platform%2Fkernel%2Flinux-rpi.git virtio_balloon: disable VIOMMU support virtio balloon bypasses the DMA API entirely so does not support the VIOMMU right now. It's not clear we need that support, for now let's just make sure we don't pretend to support it. Cc: stable@vger.kernel.org Cc: Wei Wang Fixes: 1a937693993f ("virtio: new feature to detect IOMMU device quirk") Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang --- diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 408c174..22caf80 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -663,6 +663,12 @@ static int virtballoon_restore(struct virtio_device *vdev) } #endif +static int virtballoon_validate(struct virtio_device *vdev) +{ + __virtio_clear_bit(vdev, VIRTIO_F_IOMMU_PLATFORM); + return 0; +} + static unsigned int features[] = { VIRTIO_BALLOON_F_MUST_TELL_HOST, VIRTIO_BALLOON_F_STATS_VQ, @@ -675,6 +681,7 @@ static struct virtio_driver virtio_balloon_driver = { .driver.name = KBUILD_MODNAME, .driver.owner = THIS_MODULE, .id_table = id_table, + .validate = virtballoon_validate, .probe = virtballoon_probe, .remove = virtballoon_remove, .config_changed = virtballoon_changed,