linux-kernel - Re: [PATCH 1/2] xen/netback: fix error path of xenvif_connect

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Message-ID: <CACCGGhDz6nAqoKUaZ+Ud7O7Srm1ygt=6UgSrydajizJfWZsRPQ@mail.gmail.com>
Date:   Mon, 14 Oct 2019 11:11:10 +0100
From:   Paul Durrant <pdurrant@...il.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     xen-devel <xen-devel@...ts.xenproject.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Wei Liu <wei.liu@...nel.org>,
        Paul Durrant <paul@....org>,
        "David S. Miller" <davem@...emloft.net>, stable@...r.kernel.org
Subject: Re: [PATCH 1/2] xen/netback: fix error path of xenvif_connect_data()

On Mon, 14 Oct 2019 at 10:09, Juergen Gross <jgross@...e.com> wrote:
>
> xenvif_connect_data() calls module_put() in case of error. This is
> wrong as there is no related module_get().
>
> Remove the superfluous module_put().
>
> Fixes: 279f438e36c0a7 ("xen-netback: Don't destroy the netdev until the vif is shut down")
> Cc: <stable@...r.kernel.org> # 3.12
> Signed-off-by: Juergen Gross <jgross@...e.com>

Yes, looks like this should have been cleaned up a long time ago.

Reviewed-by: Paul Durrant <paul@....org>

> ---
>  drivers/net/xen-netback/interface.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
> index 240f762b3749..103ed00775eb 100644
> --- a/drivers/net/xen-netback/interface.c
> +++ b/drivers/net/xen-netback/interface.c
> @@ -719,7 +719,6 @@ int xenvif_connect_data(struct xenvif_queue *queue,
>         xenvif_unmap_frontend_data_rings(queue);
>         netif_napi_del(&queue->napi);
>  err:
> -       module_put(THIS_MODULE);
>         return err;
>  }
>
> --
> 2.16.4
>