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virtio: use size-based config accessors.

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This lets the transport do endian conversion if necessary, and insulates
the drivers from the difference.

Most drivers can use the simple helpers virtio_cread() and virtio_cwrite().

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2013-10-14 18:11:51 +10:30
parent 0b90d0622a
commit 855e0c5288
7 changed files with 79 additions and 95 deletions
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10
drivers/virtio/virtio_balloon.c
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@@ -275,9 +275,8 @@ static inline s64 towards_target(struct virtio_balloon *vb)
__le32 v;
s64 target;
vb->vdev->config->get(vb->vdev,
offsetof(struct virtio_balloon_config, num_pages),
&v, sizeof(v));
virtio_cread(vb->vdev, struct virtio_balloon_config, num_pages, &v);
target = le32_to_cpu(v);
return target - vb->num_pages;
}
@@ -286,9 +285,8 @@ static void update_balloon_size(struct virtio_balloon *vb)
{
__le32 actual = cpu_to_le32(vb->num_pages);
vb->vdev->config->set(vb->vdev,
offsetof(struct virtio_balloon_config, actual),
&actual, sizeof(actual));
virtio_cwrite(vb->vdev, struct virtio_balloon_config, num_pages,
&actual);
}
static int balloon(void *_vballoon)