Re: [PATCH v3] can: rename LED trigger name on netdev renames

From: Kurt Van Dijck
Date: Mon Sep 10 2012 - 16:08:42 EST


On Mon, Sep 10, 2012 at 09:01:21PM +0200, Oliver Hartkopp wrote:
> On 10.09.2012 20:40, Fabio Baltieri wrote:
>
> > On Mon, Sep 10, 2012 at 08:25:50PM +0200, Oliver Hartkopp wrote:
> >> On 10.09.2012 16:28, Kurt Van Dijck wrote:
> >>> Fabio,
> >>>
> >>> I followed all your contribution to this patch.
> >
> > Thanks!
> >
> >>
> >> You created that nice function but you are accessing priv->tx_led_trig below
> >> without checking the output of save_candev_priv() ...
> >
> > Also, I noticed you removed the namespace check... wasn't it needed?
> > (just asking, I have no idea).

I don't actually know.
Anyone?

> >
> >>> + if (msg == NETDEV_CHANGENAME) {
>
>
> I do have a second remark.
>
> What about always using the notifiers to name the LED triggers?
>
> Looking into
>
> http://lxr.linux.no/#linux+v3.5.3/include/linux/netdevice.h#L1526
>
> we have NETDEV_CHANGENAME but what about
>
> NETDEV_REGISTER
>
> ???
>
> When changing and updating the LED trigger name always inside the notifier, we
> should never run into any locking or race conditions ...
>
> What do you think about this idea?
>
But the initial name must have been set properly already in that case...

Kurt
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