linux-kernel - [PATCH 12/19] virtio_ring: use u16 for last_used_idx in virtqueue_poll

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Message-ID: <20250324054333.1954-13-jasowang@redhat.com>
Date: Mon, 24 Mar 2025 13:43:26 +0800
From: Jason Wang <jasowang@...hat.com>
To: mst@...hat.com,
	jasowang@...hat.com
Cc: xuanzhuo@...ux.alibaba.com,
	eperezma@...hat.com,
	virtualization@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 12/19] virtio_ring: use u16 for last_used_idx in virtqueue_poll_split()

Use u16 for last_used_idx in virtqueue_poll_split() to align with the
spec.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/virtio/virtio_ring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 19aa24d62d20..a2884eae14d9 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -801,7 +801,7 @@ static void detach_buf_split(struct vring_virtqueue *vq, unsigned int head,
 }
 
 static bool virtqueue_poll_split(const struct vring_virtqueue *vq,
-				 unsigned int last_used_idx)
+				 u16 last_used_idx)
 {
 	return (u16)last_used_idx != virtio16_to_cpu(vq->vq.vdev,
 			vq->split.vring.used->idx);
-- 
2.42.0