From: Scott Wood <scottwood@freescale.com>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: Tjernlund <tjernlund@tjernlund.se>,
'linuxppc-dev' <linuxppc-dev@ozlabs.org>
Subject: Re: mpc83xx_restart() buggy
Date: Fri, 29 Dec 2006 17:04:28 -0600 [thread overview]
Message-ID: <45959EFC.4040404@freescale.com> (raw)
In-Reply-To: <48D9A818-DDBF-4DF1-9F79-AE93EC476511@kernel.crashing.org>
Kumar Gala wrote:
> On Dec 27, 2006, at 6:45 PM, Tjernlund wrote:
>>mpc83xx_restart() uses ioremap(), which doesn't like
>>beeing called while in IRQ context.
>>
>>Calling mpc83xx_restart() in IRQ context yields OOPS
>>which calls mpc83xx_restart() again and the loop never
>>termintes.
>
> This is interesting, I know I've seen restart work properly w/o an
> oops. How are you causing the restart?
sysrq-b triggers it, as probably does crashing from an interrupt handler
with panic_timeout nonzero. You'll need CONFIG_DEBUG_SPINLOCK_SLEEP
turned on, of course.
-Scott
next prev parent reply other threads:[~2006-12-29 23:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-28 0:45 mpc83xx_restart() buggy Tjernlund
2006-12-29 22:45 ` Kumar Gala
2006-12-29 23:04 ` Scott Wood [this message]
2006-12-30 10:49 ` Joakim Tjernlund
-- strict thread matches above, loose matches on Subject: below --
2007-01-09 8:13 Joakim Tjernlund
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