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Commit 0bc1a2ef authored by Amit Shah's avatar Amit Shah Committed by Rusty Russell
Browse files

virtio: rng: s3/s4 support 



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: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 178d855e

drivers/char/hw_random/virtio-rng.c

+17 −0
Original line number Original line Diff line number Diff line
@@ -124,6 +124,19 @@ static void __devexit virtrng_remove(struct virtio_device *vdev) 
	remove_common(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[] = {

static struct virtio_device_id id_table[] = {

	{ VIRTIO_ID_RNG, VIRTIO_DEV_ANY_ID },

	{ VIRTIO_ID_RNG, VIRTIO_DEV_ANY_ID },

	{ 0 },

	{ 0 },
@@ -135,6 +148,10 @@ static struct virtio_driver virtio_rng_driver = { 
	.id_table =	id_table,

	.id_table =	id_table,

	.probe =	virtrng_probe,

	.probe =	virtrng_probe,

	.remove =	__devexit_p(virtrng_remove),

	.remove =	__devexit_p(virtrng_remove),

#ifdef CONFIG_PM

	.freeze =	virtrng_freeze,

	.restore =	virtrng_restore,

#endif

};

};





static int __init init(void)

static int __init init(void)