Hotplug on PPC4xx

Hotplug on PPC4xx

[Sean MacLennan]

I am trying to run the /sbin/hotplug from the kernel and it doesn't
work. Has anybody got it running?

I know I am being a bit vague, but I don't want to write a long email
and find out that it is a know problem ;)

Basically, I want to automount SD cards and USB keys. So if anybody
knows a better way than hotplug, let me know. I would rather not have
to setup udev/hald/dbus.

Cheers,
   Sean

Re: Hotplug on PPC4xx

[Sean MacLennan]

On Mon, 6 Apr 2009 18:20:23 -0400
"Sean MacLennan" <sean.maclennan@ottawa.kanatek.ca> wrote:

> I am trying to run the /sbin/hotplug from the kernel and it doesn't
> work. Has anybody got it running?

I looked into it some more. It turns out that the env pointers are
freed before they are copied.

In kobject_uevent_env() if I change the line that calls the helper from
UMH_NO_WAIT to UMH_WAIT_EXEC, then it works... but probably at a loss
of performance.

		retval = call_usermodehelper(argv[0], argv,
					     env->envp, UMH_WAIT_EXEC);

Any other ideas?

Cheers,
   Sean

Re: Hotplug on PPC4xx

[Michael Ellerman]

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On Tue, 2009-04-07 at 19:27 -0400, Sean MacLennan wrote:
> On Mon, 6 Apr 2009 18:20:23 -0400
> "Sean MacLennan" <sean.maclennan@ottawa.kanatek.ca> wrote:
> 
> > I am trying to run the /sbin/hotplug from the kernel and it doesn't
> > work. Has anybody got it running?
> 
> I looked into it some more. It turns out that the env pointers are
> freed before they are copied.

That sounds like a bug?

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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