linux-kernel - Re: [PATCH 04/18] ARM: at91: make ST (System Timer) soc independent

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Date:	Mon, 20 Feb 2012 04:02:34 +0100
From:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To:	Ryan Mallon <rmallon@...il.com>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/18] ARM: at91: make ST (System Timer) soc independent

On 12:52 Mon 20 Feb     , Ryan Mallon wrote:
> On 20/02/12 12:38, Jean-Christophe PLAGNIOL-VILLARD wrote:
> 
> > On 11:22 Mon 20 Feb     , Ryan Mallon wrote:
> >> On 18/02/12 04:49, Nicolas Ferre wrote:
> >>
> >>> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
> >>>
> >>> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
> >>> Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
> >>> ---
> >>>  arch/arm/mach-at91/at91rm9200.c              |    4 +-
> >>>  arch/arm/mach-at91/at91rm9200_time.c         |   37 ++++++++++++++++----------
> >>>  arch/arm/mach-at91/generic.h                 |    1 +
> >>>  arch/arm/mach-at91/include/mach/at91_st.h    |   32 +++++++++++++++-------
> >>>  arch/arm/mach-at91/include/mach/at91rm9200.h |    2 +-
> >>>  drivers/watchdog/at91rm9200_wdt.c            |    8 +++---
> >>>  6 files changed, 53 insertions(+), 31 deletions(-)
> >>>
> >>> diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
> >>
> >> Hi Jean, Nicolas,
> >>
> >> Patch looks mostly good, couple of points below.
> >>
> >> ~Ryan
> >>
> >> <snip>
> >>
> >>>  	/* Cancel any pending alarm; flush any pending IRQ */
> >>> -	at91_sys_write(AT91_ST_RTAR, alm);
> >>> -	(void) at91_sys_read(AT91_ST_SR);
> >>> +	at91_st_write(AT91_ST_RTAR, alm);
> >>> +	(void) at91_st_read(AT91_ST_SR);
> >>
> >>
> >> Can we please remove the (void) casting of the return value when making
> >> this change, especially since at91_st_read is now a macro which doesn't
> >> even have a return value. Same in a few other places.
> > modification done by script and it's no the scope of this patch
> 
> 
> That isn't an excuse to leave incorrect code there. It is a simple fix.
no (void) in c means you don't care of the return so basically it's right

Best Regards,
J.
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