Unregister from the hwrng interface and remove the vq before entering
the S3 or S4 states. Add the vq and re-register with hwrng on restore.
Signed-off-by: Amit Shah <amit.shah@xxxxxxxxxx>
---
drivers/char/hw_random/virtio-rng.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c
index a9673a7..5708299 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -124,6 +124,19 @@ static void __devexit virtrng_remove(struct virtio_device *vdev)
remove_common(vdev);
}
+#ifdef CONFIG_PM
+static int virtrng_freeze(struct virtio_device *vdev)
+{
+ remove_common(vdev);
+ return 0;
+}
+
+static int virtrng_restore(struct virtio_device *vdev)
+{
+ return probe_common(vdev);
+}
+#endif
+
static struct virtio_device_id id_table[] = {
{ VIRTIO_ID_RNG, VIRTIO_DEV_ANY_ID },
{ 0 },
@@ -135,6 +148,10 @@ static struct virtio_driver virtio_rng_driver = {
.id_table = id_table,
.probe = virtrng_probe,
.remove = __devexit_p(virtrng_remove),
+#ifdef CONFIG_PM
+ .freeze = virtrng_freeze,
+ .restore = virtrng_restore,
+#endif
};
static int __init init(void)
--
1.7.7.6
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