linux-kernel - [PATCH] fixup! virtio: add legacy feature table support

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Date:	Thu, 23 Oct 2014 20:34:27 +0300
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, cornelia.huck@...ibm.com
Subject: [PATCH] fixup! virtio: add legacy feature table support

the following is needed on top of v4 virtio 1.0 support
that I sent.  Will squash it in for v5.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/virtio/virtio.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 85a164e..e9018b4 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -113,6 +113,13 @@ void virtio_check_driver_offered_feature(const struct virtio_device *vdev,
 	for (i = 0; i < drv->feature_table_size; i++)
 		if (drv->feature_table[i] == fbit)
 			return;
+
+	if (drv->feature_table_legacy) {
+		for (i = 0; i < drv->feature_table_size_legacy; i++)
+			if (drv->feature_table_legacy[i] == fbit)
+				return;
+	}
+
 	BUG();
 }
 EXPORT_SYMBOL_GPL(virtio_check_driver_offered_feature);
-- 
MST
--
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