linux-kernel - Re: [PATCH 1/1] NET: wan/x25_asy, move lapb_unregister to x25_asy_close

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Message-ID: <AANLkTi=DEHOKkrvzHUBnW+rAkGz-uhizRqZb2PAuh4k-@mail.gmail.com>
Date:	Thu, 25 Nov 2010 22:37:44 +1100
From:	Andrew Hendry <andrew.hendry@...il.com>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	davem@...emloft.net, netdev@...r.kernel.org, slapin@...fans.org,
	linux-kernel@...r.kernel.org, jirislaby@...il.com
Subject: Re: [PATCH 1/1] NET: wan/x25_asy, move lapb_unregister to x25_asy_close_tty

Sorry I haven't used this driver so can't fully test it. Looks
straightforward and compile tested ok.

On Thu, Nov 25, 2010 at 10:54 AM, Jiri Slaby <jslaby@...e.cz> wrote:
> We register lapb when tty is created, but unregister it only when the
> device is UP. So move the lapb_unregister to x25_asy_close_tty after
> the device is down.
>
> Signed-off-by: Jiri Slaby <jslaby@...e.cz>
> Reported-by: Sergey Lapin <slapin@...fans.org>
> Cc: Andrew Hendry <andrew.hendry@...il.com>
> ---
>  drivers/net/wan/x25_asy.c |   11 ++++++-----
>  1 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
> index 66cda25..24297b2 100644
> --- a/drivers/net/wan/x25_asy.c
> +++ b/drivers/net/wan/x25_asy.c
> @@ -498,7 +498,6 @@ norbuff:
>  static int x25_asy_close(struct net_device *dev)
>  {
>        struct x25_asy *sl = netdev_priv(dev);
> -       int err;
>
>        spin_lock(&sl->lock);
>        if (sl->tty)
> @@ -507,10 +506,6 @@ static int x25_asy_close(struct net_device *dev)
>        netif_stop_queue(dev);
>        sl->rcount = 0;
>        sl->xleft  = 0;
> -       err = lapb_unregister(dev);
> -       if (err != LAPB_OK)
> -               printk(KERN_ERR "x25_asy_close: lapb_unregister error -%d\n",
> -                       err);
>        spin_unlock(&sl->lock);
>        return 0;
>  }
> @@ -595,6 +590,7 @@ static int x25_asy_open_tty(struct tty_struct *tty)
>  static void x25_asy_close_tty(struct tty_struct *tty)
>  {
>        struct x25_asy *sl = tty->disc_data;
> +       int err;
>
>        /* First make sure we're connected. */
>        if (!sl || sl->magic != X25_ASY_MAGIC)
> @@ -605,6 +601,11 @@ static void x25_asy_close_tty(struct tty_struct *tty)
>                dev_close(sl->dev);
>        rtnl_unlock();
>
> +       err = lapb_unregister(sl->dev);
> +       if (err != LAPB_OK)
> +               printk(KERN_ERR "x25_asy_close: lapb_unregister error -%d\n",
> +                       err);
> +
>        tty->disc_data = NULL;
>        sl->tty = NULL;
>        x25_asy_free(sl);
> --
> 1.7.3.1
>
>
>
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