[prev in list] [next in list] [prev in thread] [next in thread]
List: linux-virtualization
Subject: [RFC PATCH 7/8] virtio: block: Add freeze,
From: Amit Shah <amit.shah () redhat ! com>
Date: 2011-07-28 14:47:12
Message-ID: 0a018de7cac2a27bf28287da64850729ec62e1e5.1311863438.git.amit.shah () redhat ! com
[Download RAW message or body]
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 | 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
_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linux-foundation.org/mailman/listinfo/virtualization
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic