[PATCH 2/2] [ARM] [IMX]: Fix clock usecount counter from underflow.

[Vladimir Zapolskiy]

Hello all,

and thank you for helpful comments.

2010/3/17 javier Martin <javier.martin at vista-silicon.com>

> 2010/3/17 Uwe Kleine-König <u.kleine-koenig at pengutronix.de>:
> > I'm not sure this is worth it.  IMHO an unbalanced clk_disable is a
> > severe bug that doesn't need to be handled smoothly.
> >
> > But maybe move the WARN_ON before the __clk_disable(clk->parent)?  This
> > way the disabled parent clock cannot stop the message to appear.
> >
> > Other than that, please use WARN instead of printk + WARN_ON.  Then the
> > message is printed only after the oops begin marker.
>
> I agree with Uwe, I myself tried to do something similar in the past and
> people
> made me realize that we don't have to fix here what is really a problem in
> some
> driver which calls unbalanced disable/enable.
>
> However, I think using WARN would be a good idea since it allows the
> kernel hacker
> to track an error which according to my own experience is very
> difficult to detect.
>
>
I agree with all of you that this patch is not a bug fix, but definitely a
misfeature elimination.

WARN must be present anyway to inform about an incident of multiple
clk_disable() calls, no doubt. But I assume that if a board can be easily
left in working condition after all, this could help the kernel hacker too.

Let me send a patch with respect to Uwe's comments firstly.

With best wishes,
Vladimir
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