Patch "virtio_balloon: disable VIOMMU support" has been added to the 4.11-stable tree

This is a note to let you know that I've just added the patch titled

virtio_balloon: disable VIOMMU support

to the 4.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
virtio_balloon-disable-viommu-support.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: "Michael S. Tsirkin" <[email protected]>
Date: Tue, 13 Jun 2017 20:56:44 +0300
Subject: virtio_balloon: disable VIOMMU support

From: Michael S. Tsirkin <[email protected]>

commit e41b1355508debe45fda33ef8c03ff3ba5d206b9 upstream.

virtio balloon bypasses the DMA API entirely so does not support the VIOMMU right now. It's not clear we need that support, for now let's just make sure we don't pretend to support it.

---
 drivers/virtio/virtio_balloon.c |    7 +++++++
 1 file changed, 7 insertions(+)

@@ -664,6 +664,12 @@ static int virtballoon_restore(struct vi
 }
 #endif
 
+static int virtballoon_validate(struct virtio_device *vdev)
+{
+	__virtio_clear_bit(vdev, VIRTIO_F_IOMMU_PLATFORM);
+	return 0;
+}
+
 static unsigned int features[] = {
 	VIRTIO_BALLOON_F_MUST_TELL_HOST,
 	VIRTIO_BALLOON_F_STATS_VQ,

@@ -676,6 +682,7 @@ static struct virtio_driver virtio_ballo
 	.driver.name =	KBUILD_MODNAME,
 	.driver.owner =	THIS_MODULE,
 	.id_table =	id_table,
+	.validate =	virtballoon_validate,
 	.probe =	virtballoon_probe,
 	.remove =	virtballoon_remove,
 	.config_changed = virtballoon_changed,

Patches currently in stable-queue which might be from [email protected] are

queue-4.11/virtio_balloon-disable-viommu-support.patch