linux-kernel - [vhost next 1/2] vdpa/mlx5: Make use of a specific 16 bit endianness API

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Date:   Thu, 17 Sep 2020 15:14:25 +0300
From:   Eli Cohen <elic@...dia.com>
To:     <mst@...hat.com>, <jasowang@...hat.com>,
        <virtualization@...ts.linux-foundation.org>,
        <linux-kernel@...r.kernel.org>
CC:     <lulu@...hat.com>
Subject: [vhost next 1/2] vdpa/mlx5: Make use of a specific 16 bit endianness
 API

Introduce a dedicated function to be used for setting 16 bit fields per
virio endianness requirements and use it to set the mtu field.

Signed-off-by: Eli Cohen <elic@...dia.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 70676a6d1691..e70ff7dee33d 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1514,6 +1514,11 @@ static inline bool mlx5_vdpa_is_little_endian(struct mlx5_vdpa_dev *mvdev)
 		(mvdev->actual_features & (1ULL << VIRTIO_F_VERSION_1));
 }
 
+static __virtio16 cpu_to_mlx5vdpa16(struct mlx5_vdpa_dev *mvdev, u16 val)
+{
+	return __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev), val);
+}
+
 static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
 {
 	struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
@@ -1527,8 +1532,7 @@ static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
 		return err;
 
 	ndev->mvdev.actual_features = features & ndev->mvdev.mlx_features;
-	ndev->config.mtu = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
-					     ndev->mtu);
+	ndev->config.mtu = cpu_to_mlx5vdpa16(mvdev, ndev->mtu);
 	return err;
 }
 
-- 
2.27.0