linux-kernel - [PATCH 1/2] virtio_ccw: future-proof finalize

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Date:	Tue, 9 Dec 2014 15:53:34 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	virtualization@...ts.linux-foundation.org,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>, linux390@...ibm.com,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux-s390@...r.kernel.org
Subject: [PATCH 1/2] virtio_ccw: future-proof finalize_features

We never negotiate revision > 1, but just to
make this code more likely to work when we do,
require VERSION_1 with any revision >= 1.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/s390/kvm/virtio_ccw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/s390/kvm/virtio_ccw.c b/drivers/s390/kvm/virtio_ccw.c
index f9f87ba..f92b9e6 100644
--- a/drivers/s390/kvm/virtio_ccw.c
+++ b/drivers/s390/kvm/virtio_ccw.c
@@ -758,7 +758,7 @@ static int virtio_ccw_finalize_features(struct virtio_device *vdev)
 	struct virtio_feature_desc *features;
 	struct ccw1 *ccw;
 
-	if (vcdev->revision == 1 &&
+	if (vcdev->revision >= 1 &&
 	    !__virtio_test_bit(vdev, VIRTIO_F_VERSION_1)) {
 		dev_err(&vdev->dev, "virtio: device uses revision 1 "
 			"but does not have VIRTIO_F_VERSION_1\n");
-- 
MST

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