linux-kernel - Re: [PATCH] mfd: tps65217: Drop call to irq_set

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Date:   Wed, 26 Oct 2016 14:38:55 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Lee Jones <lee.jones@...aro.org>
cc:     Guenter Roeck <linux@...ck-us.net>,
        Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Marcin Niestroj <m.niestroj@...nn-global.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] mfd: tps65217: Drop call to irq_set_parent()

On Wed, 26 Oct 2016, Lee Jones wrote:
> On Fri, 14 Oct 2016, Guenter Roeck wrote:
> 
> > The call to irq_set_parent() causes the following build error if tps65217
> > is built as module.
> > 
> > ERROR: ".irq_set_parent" [drivers/mfd/tps65217.ko] undefined!
> > 
> > The problem was introduced with commit 6556bdacf646f ("mfd: tps65217: Add
> > support for IRQs").
> > 
> > The author states: "I have added irq_set_parent() similarly as in
> > drivers/base/regmap/regmap-irq.c. But to be honest I am not sure what it
> > really does in case of tps65217."
> > 
> > So let's drop it.
> > 
> > Fixes: 6556bdacf646f ("mfd: tps65217: Add support for IRQs")
> > Cc: Marcin Niestroj <m.niestroj@...nn-global.com>
> > Cc: Arnd Bergmann <arnd@...db.de>
> > Cc: Thomas Gleixner <tglx@...utronix.de>
> > Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> > ---
> >  drivers/mfd/tps65217.c | 1 -
> >  1 file changed, 1 deletion(-)
> 
> This has been fixed now.

It was not fixed. The export was a work around as everyone was bitching
about the build robots failing forever.
 
So if the irq_set_parent() call is not required for functionality of the
driver then it should not be there in the first place.

Thanks,

	tglx