netdev - Re: [V9fs-developer] [PATCH] net/9p: fix error path of p9_virtio

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Date:   Thu, 24 May 2018 16:22:24 +0200
From:   Greg Kurz <groug@...d.org>
To:     Jean-Philippe Brucker <jean-philippe.brucker@....com>
Cc:     v9fs-developer@...ts.sourceforge.net, ericvh@...il.com,
        rminnich@...dia.gov, lucho@...kov.net, netdev@...r.kernel.org,
        davem@...emloft.net
Subject: Re: [V9fs-developer] [PATCH] net/9p: fix error path of
 p9_virtio_probe

On Thu, 24 May 2018 11:10:21 +0100
Jean-Philippe Brucker <jean-philippe.brucker@....com> wrote:

> Currently when virtio_find_single_vq fails, we go through del_vqs which
> throws a warning (Trying to free already-free IRQ). Skip del_vqs if vq
> allocation failed.
> 
> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@....com>
> ---

Reviewed-by: Greg Kurz <groug@...d.org>

>  net/9p/trans_virtio.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
> index 4d0372263e5d..1c87eee522b7 100644
> --- a/net/9p/trans_virtio.c
> +++ b/net/9p/trans_virtio.c
> @@ -562,7 +562,7 @@ static int p9_virtio_probe(struct virtio_device *vdev)
>  	chan->vq = virtio_find_single_vq(vdev, req_done, "requests");
>  	if (IS_ERR(chan->vq)) {
>  		err = PTR_ERR(chan->vq);
> -		goto out_free_vq;
> +		goto out_free_chan;
>  	}
>  	chan->vq->vdev->priv = chan;
>  	spin_lock_init(&chan->lock);
> @@ -615,6 +615,7 @@ static int p9_virtio_probe(struct virtio_device *vdev)
>  	kfree(tag);
>  out_free_vq:
>  	vdev->config->del_vqs(vdev);
> +out_free_chan:
>  	kfree(chan);
>  fail:
>  	return err;