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virtio: allow finalize_features to fail

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This will make it easy for transports to validate features and return
failure.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin
2014-12-04 20:20:27 +02:00
parent ce15408f35
commit 5c609a5ef0
9 changed files with 38 additions and 16 deletions
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4
drivers/virtio/virtio_mmio.c
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@@ -152,7 +152,7 @@ static u64 vm_get_features(struct virtio_device *vdev)
return readl(vm_dev->base + VIRTIO_MMIO_HOST_FEATURES);
}
static void vm_finalize_features(struct virtio_device *vdev)
static int vm_finalize_features(struct virtio_device *vdev)
{
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
@@ -164,6 +164,8 @@ static void vm_finalize_features(struct virtio_device *vdev)
writel(0, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SEL);
writel(vdev->features, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES);
return 0;
}
static void vm_get(struct virtio_device *vdev, unsigned offset,