From mboxrd@z Thu Jan 1 00:00:00 1970 From: robherring2@gmail.com (Rob Herring) Date: Thu, 15 Dec 2011 07:39:37 -0600 Subject: [PATCH 3/9] irq: convert generic-chip to use irq_domain In-Reply-To: <20111215055501.GC21815@S2101-09.ap.freescale.net> References: <1323876538-20406-1-git-send-email-robherring2@gmail.com> <1323876538-20406-4-git-send-email-robherring2@gmail.com> <20111215052512.GB21815@S2101-09.ap.freescale.net> <20111215055501.GC21815@S2101-09.ap.freescale.net> Message-ID: <4EE9F899.7010402@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 12/14/2011 11:55 PM, Shawn Guo wrote: > On Thu, Dec 15, 2011 at 01:25:20PM +0800, Shawn Guo wrote: >> On Wed, Dec 14, 2011 at 09:28:52AM -0600, Rob Herring wrote: >>> From: Rob Herring >>> >>> Add irq domain support to irq generic-chip. This enables users of >>> generic-chip to support dynamic irq assignment needed for DT interrupt >>> binding. Users must be converted to use irq_data.hwirq for determining >>> local interrupt numbers rather than using the Linux irq number. >>> >>> irq_base is kept for now as there are a few users of it. Once they >>> are converted to use the irq domain, it can be removed. >>> >>> Signed-off-by: Rob Herring >>> Cc: Thomas Gleixner >>> --- >> >> Tested-by: Shawn Guo >> > Sorry, I have to take that tag back after I correct my test setup. > It does not work for imx5 TZIC case, because the following change > I suggested before is missed. > > diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c > index eb763f7..2a2aac1 100644 > --- a/kernel/irq/irqdomain.c > +++ b/kernel/irq/irqdomain.c > @@ -39,7 +39,7 @@ void irq_domain_add(struct irq_domain *domain) > return; > } > d->domain = domain; > - d->hwirq = hwirq; > + d->hwirq = hwirq - domain->hwirq_base; This is a problem. It entirely defeats the point of hwirq_base and it would break the GIC. We need to fix this in the generic irq chip. Rob > } > > mutex_lock(&irq_domain_mutex); >