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Subject[PATCH v2 06/11] virtio: blk: Add freeze, restore handlers to support S4
Date
Delete the vq on the freeze callback to prepare for hibernation.
Re-create the vq in the restore callback to resume normal function.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
---
drivers/block/virtio_blk.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 717664a..b01930c 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -549,6 +549,19 @@ static void __devexit virtblk_remove(struct virtio_device *vdev)
kfree(vblk);
}

+#ifdef CONFIG_PM
+static int virtblk_freeze(struct virtio_device *vdev)
+{
+ vdev->config->del_vqs(vdev);
+ return 0;
+}
+
+static int virtblk_restore(struct virtio_device *vdev)
+{
+ return init_vq(vdev->priv);
+}
+#endif
+
static const struct virtio_device_id id_table[] = {
{ VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID },
{ 0 },
@@ -574,6 +587,10 @@ static struct virtio_driver __refdata virtio_blk = {
.probe = virtblk_probe,
.remove = __devexit_p(virtblk_remove),
.config_changed = virtblk_config_changed,
+#ifdef CONFIG_PM
+ .freeze = virtblk_freeze,
+ .restore = virtblk_restore,
+#endif
};

static int __init init(void)
--
1.7.6.2


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