linux-kernel - Re: understanding firmware loader for speedtouch (kernel 2.6.21.5)

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Message-ID: <ca35ce500707090408w744674e8s43a06422ea80cad5@mail.gmail.com>
Date:	Mon, 9 Jul 2007 13:08:55 +0200
From:	mikie <mikie.pl@...il.com>
To:	"Indan Zupancic" <indan@....nu>
Cc:	"Duncan Sands" <duncan.sands@...h.u-psud.fr>,
	linux-kernel@...r.kernel.org
Subject: Re: understanding firmware loader for speedtouch (kernel 2.6.21.5)

2007/7/9, Indan Zupancic <indan@....nu>:
> On Mon, July 9, 2007 10:49, mikie wrote:
> > 2007/7/6, Indan Zupancic <indan@....nu>:
> >> On Fri, July 6, 2007 16:20, Duncan Sands wrote:
> >> > On Friday 6 July 2007 14:54:18 mikie wrote:
> >> >> Hi,
> >> >>
> >> >> I experience some problems with the speedtch.c module, especially in
> >> >> regards to its firmware loader.
> >> >> I am not quite sure if this module is going to load the firmware
> >> >> itself or does it use some external software to do that ?
> >> >
> >> > It loads it itself, using some external software!
> >>
> >> For information, it generates a hotplug event and the kernel calls the
> >> program written at /proc/sys/kernel/hotplug with certain information.
> >> That used to be /sbin/hotplug, became later udev, but today in general
> >> udev reads the uevents generated by the kernel.
> >
> > On my system the /proc/sys/kernel/hotplug points to /sbin/hotplug.
> > I copied your script to /sbin/hotplug and also added simple logging,
> > so I can see whenever the script is being started. It turns out that
> > the script is not started at all by the kernel...
> >
> > I am afraid that the kernel generates uevents only, could this be true?
>
> Not really, it would break backward compatibility, and if it were true,
> they're remove the /proc/sys/kernel/hotplug setting too. As far as I know,
> if it's set, that program will be executed, and if zero is written to it, only
> uevents are generated.
>
> Make sure that the script is executable (chmod +x)

Yes I have set it to be executable:
root@srv:/sbin# ls -lah hotplug
-rwxr-xr-x    1 root     root          934 Jul  9 09:13 hotplug

> and has "#!/bin/sh"
> at the top, or else it won't work. If that's already the case, I've no idea.

root@srv:/sbin# head hotplug
#!/bin/sh
set -e


Everything looks OK, but still it does not fire up the script...

Regards,
MK
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