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@xxxxxxxxxx>
---
drivers/block/virtio_blk.c | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 079c088..700ad76 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -540,6 +540,26 @@ 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)
+{
+ struct virtio_blk *vblk = vdev->priv;
+ int err = 0;
+
+ vblk->vq = virtio_find_single_vq(vdev, blk_done, "requests");
+ if (IS_ERR(vblk->vq))
+ err = PTR_ERR(vblk->vq);
+
+ return err;
+}
+#endif
+
static const struct virtio_device_id id_table[] = {
{ VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID },
{ 0 },
@@ -565,6 +585,10 @@ 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
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