From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id E8AFCDDDA9 for ; Wed, 18 Feb 2009 01:43:14 +1100 (EST) Message-Id: <22854A2F-2FBD-4F1A-B623-DB5C91E97509@kernel.crashing.org> From: Kumar Gala To: Li Yang In-Reply-To: <2a27d3730902170638h43724c03k6b50843158842e1e@mail.gmail.com> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Mime-Version: 1.0 (Apple Message framework v930.3) Subject: Re: [PATCH] fix the interrupt loss problem on powerpc IPIC (2.6.23) Date: Tue, 17 Feb 2009 08:43:03 -0600 References: <76C7F485-EF75-4B83-B673-564E6243C7C6@kernel.crashing.org> <2a27d3730902170638h43724c03k6b50843158842e1e@mail.gmail.com> Cc: linuxppc-dev@ozlabs.org, "" , linux-kernel@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Feb 17, 2009, at 8:38 AM, Li Yang wrote: > On Tue, Feb 17, 2009 at 10:12 PM, Kumar Gala > wrote: >> >> On Feb 17, 2009, at 6:44 AM, > > >> wrote: >> >>> From: Da Yu >>> Date: Tue, 17 Feb 2009 19:58:20 +0800 >>> Subject: [PATCH] fix the interrupt loss problem on powerpc IPIC >>> (2.6.23) >>> >>> Signed-off-by: Da Yu >>> --- >> >> Please provide a bit more description as to why this fixes the issue. > > The pending register is write 1 clear. If there are more than one > external interrupts pending at the same time, acking the first > interrupt will also clear other interrupt pending bits. That will > cause loss of interrupt. > > - Leo Thanks. That should be included in the commit message. - k