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From:   Eli Cohen <elic@nvidia.com>
To:     <mst@redhat.com>, <jasowang@redhat.com>,
        <linux-kernel@vger.kernel.org>,
        <virtualization@lists.linux-foundation.org>,
        <netdev@vger.kernel.org>
CC:     <elic@nvidia.com>
Subject: [PATCH] vdpa/mlx5: Fix wrong use of bit numbers
Date:   Mon, 1 Mar 2021 08:28:17 +0200
Message-ID: <20210301062817.39331-1-elic@nvidia.com>
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VIRTIO_F_VERSION_1 is a bit number. Use BIT_ULL() with mask
conditionals.

Also, in mlx5_vdpa_is_little_endian() use BIT_ULL for consistency with
the rest of the code.

Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices=
")
Signed-off-by: Eli Cohen <elic@nvidia.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5=
_vnet.c
index dc7031132fff..7d21b857a94a 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -821,7 +821,7 @@ static int create_virtqueue(struct mlx5_vdpa_net *ndev,=
 struct mlx5_vdpa_virtque
 	MLX5_SET(virtio_q, vq_ctx, event_qpn_or_msix, mvq->fwqp.mqp.qpn);
 	MLX5_SET(virtio_q, vq_ctx, queue_size, mvq->num_ent);
 	MLX5_SET(virtio_q, vq_ctx, virtio_version_1_0,
-		 !!(ndev->mvdev.actual_features & VIRTIO_F_VERSION_1));
+		 !!(ndev->mvdev.actual_features & BIT_ULL(VIRTIO_F_VERSION_1)));
 	MLX5_SET64(virtio_q, vq_ctx, desc_addr, mvq->desc_addr);
 	MLX5_SET64(virtio_q, vq_ctx, used_addr, mvq->device_addr);
 	MLX5_SET64(virtio_q, vq_ctx, available_addr, mvq->driver_addr);
@@ -1578,7 +1578,7 @@ static void teardown_virtqueues(struct mlx5_vdpa_net =
*ndev)
 static inline bool mlx5_vdpa_is_little_endian(struct mlx5_vdpa_dev *mvdev)
 {
 	return virtio_legacy_is_little_endian() ||
-		(mvdev->actual_features & (1ULL << VIRTIO_F_VERSION_1));
+		(mvdev->actual_features & BIT_ULL(VIRTIO_F_VERSION_1));
 }
=20
 static __virtio16 cpu_to_mlx5vdpa16(struct mlx5_vdpa_dev *mvdev, u16 val)
--=20
2.30.1