From: "Justin T. Gibbs" <gibbs@scsiguy.com>
To: random1@o-o.yi.org, linux-scsi@vger.kernel.org
Subject: Re: aic7xxx dump_card_state not reentrant?
Date: Sat, 17 Aug 2002 13:54:24 -0600 [thread overview]
Message-ID: <3520000.1029614064@aslan.scsiguy.com> (raw)
In-Reply-To: <uwuqp79nn.fsf@o-o.yi.org>
> I'm trying to get suspend and resume working for a 2.4 kernel with
> scsi devices, and I'm running into trouble saving and restoring the
> card state. One thing that I've discovered in the process of looking
> into this is that the ahc_dump_card_state routine is called at both
> process level and interrupt level. If I read it correctly, it alters
> the card state while dumping the list of SCBs. If a sequencer
> interrupt occurs in the meantime, bad stuff happens. Doesn't it?
> Well, I'm seeing panics in which ahc_dump_card_state is running in
> both contexts "simultaneously."
You must hold the ahc_lock() before calling most routines in the driver.
It is tha ahc_lock() that protects against reentrancy.
--
Justin
next prev parent reply other threads:[~2002-08-17 19:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-17 16:05 aic7xxx dump_card_state not reentrant? random1
2002-08-17 19:54 ` Justin T. Gibbs [this message]
2002-08-17 23:14 ` sym53c8xx message d sent on bad reselection Daryl Zero
2002-08-17 23:42 ` Daryl Zero
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