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From: Yong Zhang <yong.zhang@windriver.com>
To: Will Newton <will.newton@gmail.com>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: Threaded irq handler question
Date: Thu, 22 Apr 2010 09:37:21 +0800	[thread overview]
Message-ID: <20100422013721.GC8938@windriver.com> (raw)
In-Reply-To: <l2u87a5b0801004210935wf6ca2991ua777c39c737391f8@mail.gmail.com>

On Wed, Apr 21, 2010 at 05:35:32PM +0100, Will Newton wrote:
> Hi all,
> My problem is that this structure does not work, because once I call
> disable_irq_nosync() on the irq in the check handler the thread will
> no longer run because the irq is disabled. However if I don't call
> disable_irq_nosync() I will get endless irqs because the line is
> level-triggered and will not be deasserted until the thread has run.
> 
> Could someone tell me what I'm doing wrong here?

Does IRQF_ONESHOT meet your need?

Thanks,
Yong

  parent reply	other threads:[~2010-04-22  1:37 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-21 16:35 Threaded irq handler question Will Newton
2010-04-21 17:28 ` Jonathan Corbet
2010-04-22 10:51   ` Will Newton
2010-04-22  1:37 ` Yong Zhang [this message]
2010-04-22 10:51   ` Will Newton
2010-04-23 13:30     ` Mark Brown
2010-04-23 13:29 ` Mark Brown

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