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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20020515083645.7320aefa.reynolds@redhat.com \
--to=reynolds@redhat.com \
--cc=Jack.Bloch@icn.siemens.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.