virtio_balloon: fix up endian-ness for free cmd id
commit 168c358af2f8c5a37f8b5f877ba2cc93995606ee upstream.
free cmd id is read using virtio endian, spec says all fields
in balloon are LE. Fix it up.
Fixes: 86a559787e
("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Wei Wang <wei.w.wang@intel.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -529,10 +529,14 @@ static int init_vqs(struct virtio_balloon *vb)
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static u32 virtio_balloon_cmd_id_received(struct virtio_balloon *vb)
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{
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if (test_and_clear_bit(VIRTIO_BALLOON_CONFIG_READ_CMD_ID,
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&vb->config_read_bitmap))
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&vb->config_read_bitmap)) {
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virtio_cread(vb->vdev, struct virtio_balloon_config,
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free_page_report_cmd_id,
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&vb->cmd_id_received_cache);
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/* Legacy balloon config space is LE, unlike all other devices. */
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if (!virtio_has_feature(vb->vdev, VIRTIO_F_VERSION_1))
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vb->cmd_id_received_cache = le32_to_cpu((__force __le32)vb->cmd_id_received_cache);
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}
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return vb->cmd_id_received_cache;
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}
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