lkml.org 
[lkml]   [2008]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/3] HPET: Enter hpet_interrupt_handler with interrupts disabled
On Sun, Nov 2, 2008 at 4:04 PM, Matt Fleming <mjf@gentoo.org> wrote:
> Some functions that may be called from this handler require that
> interrupts are disabled.
>
> Signed-off-by: Matt Fleming <mjf@gentoo.org>
> ---
> arch/x86/kernel/hpet.c | 3 ++-
> 1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
> index f10f946..c28fff2 100644
> --- a/arch/x86/kernel/hpet.c
> +++ b/arch/x86/kernel/hpet.c
> @@ -445,7 +445,8 @@ static int hpet_setup_irq(struct hpet_dev *dev)
> {
>
> if (request_irq(dev->irq, hpet_interrupt_handler,
> - IRQF_SHARED|IRQF_NOBALANCING, dev->name, dev))
> + IRQF_DISABLED|IRQF_SHARED|IRQF_NOBALANCING,
> + dev->name, dev))

Combining IRQF_DISABLED and IRQF_SHARED does not reliably disable
interrupts in the handler. Perhaps IRQF_SHARED should be removed at
the same time?

> return -1;
>
> disable_irq(dev->irq);
> --
> 1.5.6.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>


\
 
 \ /
  Last update: 2008-11-02 22:39    [from the cache]
©2003-2014 Jasper Spaans. hosted at Digital Ocean