From: Kurt Van Dijck <kurt.van.dijck@eia.be>
To: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Fabio Baltieri <fabio.baltieri@gmail.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
linux-can@vger.kernel.org, linux-kernel@vger.kernel.org,
Wolfgang Grandegger <wg@grandegger.com>
Subject: Re: [PATCH can-next v6] can: add tx/rx LED trigger support
Date: Tue, 4 Sep 2012 09:11:28 +0200 [thread overview]
Message-ID: <20120904071128.GB416@vandijck-laurijssen.be> (raw)
In-Reply-To: <50451919.20205@hartkopp.net>
On Mon, Sep 03, 2012 at 10:54:49PM +0200, Oliver Hartkopp wrote:
> On 03.09.2012 20:29, Fabio Baltieri wrote:
>
> > On Mon, Sep 03, 2012 at 08:13:35PM +0200, Kurt Van Dijck wrote:
> >> On Mon, Sep 03, 2012 at 02:40:39PM +0200, Marc Kleine-Budde wrote:
> >>> The net->ifindex is unique. But it's only an integer. Usually can0 has a
> >>> ifindex != 0, so a simple can%d is contra productive here.
> >>>
> >>> Some pointers to related code:
> >>> http://lxr.free-electrons.com/source/drivers/base/core.c#L1847
> >>> http://lxr.free-electrons.com/source/drivers/base/core.c#L73
> >>> http://lxr.free-electrons.com/source/include/linux/device.h#L695
> >>>
> >>> comments?
> >
> > That would probabily makes really hard to choose the right
> > default_trigger for led devices to get to the appropriate CAN LED in
> > embedded systems, as trigger name would depend from other network
> > devices and probing order (correct me if I'm wrong).
> >
> > Something with device name would probaily be more appropriate here.
> >
> >>
> >> a very recent idea: something with netdevice notifiers and NETDEV_CHANGENAME ...
> >> http://lxr.free-electrons.com/source/net/core/dev.c#L1030
> >>
> >> you could: rename the trigger, or if we think it's usefull,
> >> block the netdev rename when its triggers are in use.
> >
> > Blocking the rename looks overkill to me,
renaming a netdev _after_ first attaching led triggers looks stupid to me
anyway.
> > what about using device name
> > with an optional "port id" appended to it? Sounds simpler...
>
>
> The name of the device can only be changed when the interface is down.
> Is it possible to put some scripting around it to detach and attach the leds
> to the interfaces on ifup/ifdown triggers?
Are the led triggers available for using while the netdev is down then?
Kurt
next prev parent reply other threads:[~2012-09-04 7:11 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-30 19:20 [PATCH can-next v3 1/2] can: add tx/rx LED trigger support Fabio Baltieri
2012-07-30 19:20 ` [PATCH can-next v3 2/2] can: flexcan: add " Fabio Baltieri
2012-07-30 21:17 ` [PATCH can-next v3 1/2] can: add tx/rx " Marc Kleine-Budde
2012-07-31 6:57 ` Fabio Baltieri
2012-07-31 7:10 ` Marc Kleine-Budde
2012-07-31 11:57 ` Fabio Baltieri
2012-07-31 12:00 ` Marc Kleine-Budde
2012-07-31 22:05 ` [PATCH can-next v4] " Fabio Baltieri
2012-08-01 9:36 ` Marc Kleine-Budde
2012-08-01 10:07 ` Marc Kleine-Budde
2012-08-01 10:30 ` Fabio Baltieri
2012-08-01 11:37 ` Marc Kleine-Budde
2012-08-01 11:49 ` [PATCH can-next v5 1/2] " Fabio Baltieri
2012-08-01 11:49 ` [PATCH can-next v5 2/2] can: flexcan: add " Fabio Baltieri
2012-08-01 11:53 ` Marc Kleine-Budde
2012-08-01 12:24 ` Fabio Baltieri
2012-08-01 12:30 ` Marc Kleine-Budde
2012-08-01 21:02 ` Marc Kleine-Budde
2012-08-01 11:59 ` [PATCH can-next v5 1/2] can: add tx/rx " Marc Kleine-Budde
2012-08-01 12:06 ` Oliver Hartkopp
2012-08-01 12:18 ` Marc Kleine-Budde
2012-08-01 18:21 ` [PATCH can-next v6] " Fabio Baltieri
2012-08-01 21:00 ` Marc Kleine-Budde
2012-08-01 22:38 ` Fabio Baltieri
2012-08-01 21:05 ` Oliver Hartkopp
2012-08-24 5:10 ` Kurt Van Dijck
2012-08-24 11:28 ` Marc Kleine-Budde
2012-08-24 12:42 ` Kurt Van Dijck
2012-08-24 22:01 ` Fabio Baltieri
2012-08-25 20:25 ` Kurt Van Dijck
2012-09-03 12:40 ` Marc Kleine-Budde
2012-09-03 18:13 ` Kurt Van Dijck
2012-09-03 18:29 ` Fabio Baltieri
2012-09-03 20:54 ` Oliver Hartkopp
2012-09-04 7:11 ` Kurt Van Dijck [this message]
2012-09-04 9:29 ` [PATCH] can: rename LED trigger name on netdev renames Kurt Van Dijck
2012-09-06 18:59 ` Fabio Baltieri
2012-09-06 19:31 ` Oliver Hartkopp
2012-09-06 20:46 ` Fabio Baltieri
2012-09-07 7:19 ` Kurt Van Dijck
2012-09-09 16:17 ` [PATCH v2] " Fabio Baltieri
2012-09-10 14:25 ` [PATCH] can: export a safe netdev_priv wrapper for candev Kurt Van Dijck
2012-09-10 18:22 ` Oliver Hartkopp
2012-09-10 18:29 ` Fabio Baltieri
2012-09-10 19:55 ` [PATCH v2] " Kurt Van Dijck
2012-09-10 14:28 ` [PATCH v3] can: rename LED trigger name on netdev renames Kurt Van Dijck
2012-09-10 18:25 ` Oliver Hartkopp
2012-09-10 18:40 ` Fabio Baltieri
2012-09-10 19:01 ` Oliver Hartkopp
2012-09-10 20:08 ` Kurt Van Dijck
2012-09-11 5:42 ` Oliver Hartkopp
2012-09-11 7:13 ` Fabio Baltieri
2012-09-12 7:22 ` Kurt Van Dijck
2012-09-11 8:05 ` Kurt Van Dijck
2012-09-10 20:06 ` [PATCH v4] " Kurt Van Dijck
2012-09-11 21:04 ` Fabio Baltieri
2012-09-04 20:15 ` [PATCH can-next v6] can: add tx/rx LED trigger support Fabio Baltieri
2012-09-06 10:33 ` Kurt Van Dijck
2012-09-06 11:17 ` Fabio Baltieri
2012-09-06 15:11 ` Kurt Van Dijck
2012-09-06 20:57 ` Fabio Baltieri
2012-09-07 7:04 ` Kurt Van Dijck
2012-09-07 18:59 ` Fabio Baltieri
2012-07-31 8:46 ` [PATCH can-next v3 1/2] " Wolfgang Grandegger
2012-07-31 10:12 ` Marc Kleine-Budde
2012-07-31 11:55 ` Fabio Baltieri
2012-07-31 12:14 ` Fabio Baltieri
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