linux-kernel - [PATCH] vdpa: fix warning casts when building with C=2

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Message-Id: <20220811084749.83809-1-sgarzare@redhat.com>
Date:   Thu, 11 Aug 2022 10:47:49 +0200
From:   Stefano Garzarella <sgarzare@...hat.com>
To:     virtualization@...ts.linux-foundation.org
Cc:     linux-kernel@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>
Subject: [PATCH] vdpa: fix warning casts when building with C=2

Use __virtio16_to_cpu() to read `max_virtqueue_pairs` field in
virtio_net_config since its type is __virtio16.

This silences the following warning when building with `make C=2`:

    ../drivers/vdpa/vdpa.c:811:19: warning: cast to restricted __le16
    ../drivers/vdpa/vdpa.c:811:19: warning: cast from restricted __virtio16

Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
---
 drivers/vdpa/vdpa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index c06c02704461..2466d5087478 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -808,7 +808,7 @@ static int vdpa_dev_net_mq_config_fill(struct vdpa_device *vdev,
 	if ((features & BIT_ULL(VIRTIO_NET_F_MQ)) == 0)
 		return 0;
 
-	val_u16 = le16_to_cpu(config->max_virtqueue_pairs);
+	val_u16 = __virtio16_to_cpu(true, config->max_virtqueue_pairs);
 	return nla_put_u16(msg, VDPA_ATTR_DEV_NET_CFG_MAX_VQP, val_u16);
 }
 
-- 
2.37.1