linux-kernel - Re: [PATCH v2 1/3] virtio_ring: Fix error reporting in virtqueue

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Message-ID: <CACGkMEvvNcnDvsowuEKOxK9W+un3dYWP+YxtNd4Z1XsUU-ZrUA@mail.gmail.com>
Date: Thu, 22 May 2025 09:56:02 +0800
From: Jason Wang <jasowang@...hat.com>
To: Laurent Vivier <lvivier@...hat.com>
Cc: linux-kernel@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>, netdev@...r.kernel.org, 
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Subject: Re: [PATCH v2 1/3] virtio_ring: Fix error reporting in virtqueue_resize

On Wed, May 21, 2025 at 5:22 PM Laurent Vivier <lvivier@...hat.com> wrote:
>
> The virtqueue_resize() function was not correctly propagating error codes
> from its internal resize helper functions, specifically
> virtqueue_resize_packet() and virtqueue_resize_split(). If these helpers
> returned an error, but the subsequent call to virtqueue_enable_after_reset()
> succeeded, the original error from the resize operation would be masked.
> Consequently, virtqueue_resize() could incorrectly report success to its
> caller despite an underlying resize failure.
>
> This change restores the original code behavior:
>
>        if (vdev->config->enable_vq_after_reset(_vq))
>                return -EBUSY;
>
>        return err;
>
> Fix: commit ad48d53b5b3f ("virtio_ring: separate the logic of reset/enable from virtqueue_resize")
> Cc: xuanzhuo@...ux.alibaba.com
> Signed-off-by: Laurent Vivier <lvivier@...hat.com>
> ---

Acked-by: Jason Wang <jasowang@...hat.com>

Thanks