linux-kernel - Re: [PATCH] Fix RTC_AIE with CONFIG_HPET_EMULATE

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Date:	Sun, 23 Dec 2007 19:15:11 +0100
From:	"Clemens Ladisch" <clemens@...isch.de>
To:	"Bernhard Walle" <bwalle@...e.de>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Cc:	tglx@...utronix.de
Subject: Re: [PATCH] Fix RTC_AIE with CONFIG_HPET_EMULATE_RTC

Bernhard Walle wrote:
> In the current code, RTC_AIE doesn't work if the RTC relies on
> CONFIG_HPET_EMULATE_RTC because the code sets the RTC_AIE flag
> in hpet_set_rtc_irq_bit(). The interrupt handles does accidentally
> check for RTC_PIE and not RTC_AIE when comparing the time
> which was set in hpet_set_alarm_time().
> 
> This patch is against 2.6.24-rc5-mm1.
> 
> 
> Signed-off-by: Bernhard Walle <bwalle@...e.de>

Acked-by: Clemens Ladisch <clemens@...isch.de>

> ---
>  arch/x86/kernel/hpet.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- a/arch/x86/kernel/hpet.c
> +++ b/arch/x86/kernel/hpet.c
> @@ -657,7 +657,7 @@ irqreturn_t hpet_rtc_interrupt(int irq, 
>  		hpet_pie_count = 0;
>  	}
>  
> -	if (hpet_rtc_flags & RTC_PIE &&
> +	if (hpet_rtc_flags & RTC_AIE &&
>  	    (curr_time.tm_sec == hpet_alarm_time.tm_sec) &&
>  	    (curr_time.tm_min == hpet_alarm_time.tm_min) &&
>  	    (curr_time.tm_hour == hpet_alarm_time.tm_hour))
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