linux-kernel - [PATCH] virtio_ring: add an error code check in virtqueue

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Message-Id: <20231020092320.209234-1-suhui@nfschina.com>
Date:   Fri, 20 Oct 2023 17:23:21 +0800
From:   Su Hui <suhui@...china.com>
To:     mst@...hat.com, jasowang@...hat.com, xuanzhuo@...ux.alibaba.com
Cc:     Su Hui <suhui@...china.com>,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] virtio_ring: add an error code check in virtqueue_resize

virtqueue_resize_packed() or virtqueue_resize_split() can return
error code if failed, so add a check for this.

Signed-off-by: Su Hui <suhui@...china.com>
---

I'm not sure that return directly is right or not,
maybe there are some process should do before return.

 drivers/virtio/virtio_ring.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 51d8f3299c10..cf662c3a755b 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -2759,6 +2759,9 @@ int virtqueue_resize(struct virtqueue *_vq, u32 num,
 	else
 		err = virtqueue_resize_split(_vq, num);
 
+	if (err)
+		return err;
+
 	return virtqueue_enable_after_reset(_vq);
 }
 EXPORT_SYMBOL_GPL(virtqueue_resize);
-- 
2.30.2