From: Tommy Reynolds <reynolds@redhat.com>
To: "Bloch, Jack" <Jack.Bloch@icn.siemens.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Device driver question
Date: Wed, 15 May 2002 08:36:45 -0500 [thread overview]
Message-ID: <20020515083645.7320aefa.reynolds@redhat.com> (raw)
In-Reply-To: <180577A42806D61189D30008C7E632E87938E1@boca213a.boca.ssc.siemens.com>
Uttered "Bloch, Jack" <Jack.Bloch@icn.siemens.com>, spoke thus:
> I have a specific case where our HW can generate a
> special interrupt. In this case I simply want the ISR to halt the system
> (i.e. take the same action as if I typed halt from the command line). How
> can I from within my device driver cause a halt? Please CC me specifically
> on any replies.
Check out the code for "sys_reboot" in "kernel/sys.c" for ideas on how to do
this. I don't think you can invoke "sys_reboot" from inside an interrupt
handler, but you could probably do the same thing by calling the service
routines "sys_reboot" does.
If that doesn't shut your machine down gracefully, then you might resort to
"call_usermodehelper" in "kernel/kmod.c" to run "/sbin/shutdown -h now". You
can't invoke "call_usermodehelper" from an interrupt top half, but it should
work find from a tasklett.
next prev parent reply other threads:[~2002-05-15 13:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-15 13:17 Device driver question Bloch, Jack
2002-05-15 13:36 ` Tommy Reynolds [this message]
2002-05-15 15:03 ` Joe deBlaquiere
2002-05-15 15:13 ` Tommy Reynolds
2002-05-15 15:16 ` Tommy Reynolds
2002-05-16 0:18 ` jw schultz
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