netdev - [PATCH V5 6/6] fix 'cast to restricted le16' warnings in vdpa.c

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Date:   Fri, 12 Aug 2022 18:45:00 +0800
From:   Zhu Lingshan <lingshan.zhu@...el.com>
To:     jasowang@...hat.com, mst@...hat.com
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, parav@...dia.com, xieyongji@...edance.com,
        gautam.dawar@....com, Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH V5 6/6] fix 'cast to restricted le16' warnings in vdpa.c

This commit fixes spars warnings: cast to restricted __le16
in function vdpa_dev_net_config_fill() and
vdpa_fill_stats_rec()

Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>
Reviewed-by: Parav Pandit <parav@...dia.com>
---
 drivers/vdpa/vdpa.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index f6172c8dd262..0e5fa97dfcc3 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -847,7 +847,11 @@ static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *ms
 
 	vdpa_get_config_unlocked(vdev, 0, &config, sizeof(config));
 
-	val_u16 = le16_to_cpu(config.status);
+	/*
+	 * Assume little endian for now, userspace can tweak this for
+	 * legacy guest support.
+	 */
+	val_u16 = __virtio16_to_cpu(true, config.status);
 	if (nla_put_u16(msg, VDPA_ATTR_DEV_NET_STATUS, val_u16))
 		return -EMSGSIZE;
 
@@ -937,7 +941,11 @@ static int vdpa_fill_stats_rec(struct vdpa_device *vdev, struct sk_buff *msg,
 	}
 	vdpa_get_config_unlocked(vdev, 0, &config, sizeof(config));
 
-	max_vqp = le16_to_cpu(config.max_virtqueue_pairs);
+	/*
+	 * Assume little endian for now, userspace can tweak this for
+	 * legacy guest support.
+	 */
+	max_vqp = __virtio16_to_cpu(true, config.max_virtqueue_pairs);
 	if (nla_put_u16(msg, VDPA_ATTR_DEV_NET_CFG_MAX_VQP, max_vqp))
 		return -EMSGSIZE;
 
-- 
2.31.1