From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759583AbXKBRsf (ORCPT ); Fri, 2 Nov 2007 13:48:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755335AbXKBRs1 (ORCPT ); Fri, 2 Nov 2007 13:48:27 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:41016 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752273AbXKBRs1 (ORCPT ); Fri, 2 Nov 2007 13:48:27 -0400 Date: Fri, 2 Nov 2007 10:37:52 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: Justin Forbes , Zwane Mwaikambo , "Theodore Ts'o" , Randy Dunlap , Dave Jones , Chuck Wolber , Chris Wedgwood , Michael Krufky , Chuck Ebbert , Domenico Andreoli , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Thomas Gleixner Subject: [patch 2/9] genirq: suppress resend of level interrupts Message-ID: <20071102173752.GC6378@kroah.com> References: <20071102173359.709442489@mini.kroah.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline; filename="genirq-suppress-resend-of-level-interrupts.patch" In-Reply-To: <20071102173733.GA6378@kroah.com> User-Agent: Mutt/1.5.16 (2007-06-09) X-Bad-Reply: References and In-Reply-To but no 'Re:' in Subject. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 2.6.22-stable review patch. If anyone has any objections, please let us know. ------------------ From: Thomas Gleixner patch 2464286ace55b3abddfb9cc30ab95e2dac1de9a6 in mainline. Level type interrupts are resent by the interrupt hardware when they are still active at irq_enable(). Suppress the resend mechanism for interrupts marked as level. Signed-off-by: Thomas Gleixner Signed-off-by: Linus Torvalds Cc: Chuck Ebbert Signed-off-by: Greg Kroah-Hartman --- kernel/irq/resend.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/kernel/irq/resend.c +++ b/kernel/irq/resend.c @@ -62,7 +62,12 @@ void check_irq_resend(struct irq_desc *d */ desc->chip->enable(irq); - if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) { + /* + * We do not resend level type interrupts. Level type + * interrupts are resent by hardware when they are still + * active. + */ + if ((status & (IRQ_LEVEL | IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) { desc->status = (status & ~IRQ_PENDING) | IRQ_REPLAY; if (!desc->chip || !desc->chip->retrigger || --