From: Eugene Surovegin <ebs@ebshome.net>
To: Sam Song <samlinuxppc@yahoo.com.cn>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Can I operate i2c device in a tasklet?
Date: Fri, 2 Dec 2005 00:45:40 -0800 [thread overview]
Message-ID: <20051202084540.GA16031@gate.ebshome.net> (raw)
In-Reply-To: <20051202062007.52513.qmail@web15804.mail.cnb.yahoo.com>
On Fri, Dec 02, 2005 at 02:20:07PM +0800, Sam Song wrote:
> Hi all,
>
> I found that once I operated i2c bus like
> read from i2c device in 2.4.31 kernl in a
> interrupt handler or tasklet, kernel panic
> would happen. Is there any way to make it
> in such case? I need to write sth on RTC
> alarm register with an interrupt event.
>
> ......
> Scheduling in interrupt
> kernel BUG at sched.c:564!
You cannot access i2c layer from non-process context. Please, search
mail list archives, this matter was discussed countless number of
times.
--
Eugene
prev parent reply other threads:[~2005-12-02 8:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-02 6:20 Can I operate i2c device in a tasklet? Sam Song
2005-12-02 8:45 ` Eugene Surovegin [this message]
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