linux-kernel - Re: [PATCH v2 0/4] Exynos 5410 Dual cluster support

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Date:	Thu, 17 Oct 2013 17:24:56 +0300
From:	Aliaksei Katovich <aliaksei.katovich@...il.com>
To:	Tarek Dakhran <t.dakhran@...sung.com>
Cc:	Kevin Hilman <khilman@...aro.org>,
	Vyacheslav Tyrtov <v.tyrtov@...sung.com>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	Ben Dooks <ben-linux@...ff.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	linux-samsung-soc@...r.kernel.org, Rob Landley <rob@...dley.net>,
	Mike Turquette <mturquette@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Naour Romain <romain.naour@...nwide.fr>,
	linux-arm-kernel@...ts.infradead.org,
	Heiko Stuebner <heiko@...ech.de>
Subject: Re: [PATCH v2 0/4] Exynos 5410 Dual cluster support

hi Tarek;

<skip>

> > 	However there seem to be some issues with virq allocations, like this:
> >
> > <snippet>
> > Starting kernel ...
> >                     
> > [    0.000000] [<c0014d48>] (unwind_backtrace+0x0/0xf8) from [<c00117d0>] (show_stack+0x10/0x14)
> > [    0.000000] [<c00117d0>] (show_stack+0x10/0x14) from [<c0363488>] (dump_stack+0x6c/0xac)
> > [    0.000000] [<c0363488>] (dump_stack+0x6c/0xac) from [<c001e330>] (warn_slowpath_common+0x64/0x88)
> > [    0.000000] [<c001e330>] (warn_slowpath_common+0x64/0x88) from [<c001e3e8>] (warn_slowpath_fmt+0x30/0x40)
> > [    0.000000] [<c001e3e8>] (warn_slowpath_fmt+0x30/0x40) from [<c005a1b4>] (irq_domain_associate+0x128/0x1a8)
> > [    0.000000] [<c005a1b4>] (irq_domain_associate+0x128/0x1a8) from [<c005a508>] (irq_domain_associate_many+0x30/0x3c
> > )
> > [    0.000000] [<c005a508>] (irq_domain_associate_many+0x30/0x3c) from [<c005a768>] (irq_domain_add_simple+0x78/0x90)
> > [    0.000000] [<c005a768>] (irq_domain_add_simple+0x78/0x90) from [<c04b044c>] (combiner_of_init+0xb4/0x198)
> > [    0.000000] [<c04b044c>] (combiner_of_init+0xb4/0x198) from [<c04b6938>] (of_irq_init+0x278/0x2a0)
> > [    0.000000] [<c04b6938>] (of_irq_init+0x278/0x2a0) from [<c049b8fc>] (start_kernel+0x18c/0x384)
> > [    0.000000] [<c049b8fc>] (start_kernel+0x18c/0x384) from [<40008074>] (0x40008074)
> > [    0.000000] ---[ end trace 1b75b31a2719edcd ]---
> > [    0.000000] ------------[ cut here ]------------
> > [    0.000000] WARNING: CPU: 0 PID: 0 at kernel/irq/irqdomain.c:278 irq_domain_associate+0x128/0x1a8()
> > [    0.000000] error: virq337 is not allocated
> > [    0.000000] Modules linked in:
> > [    0.000000] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W    3.12.0-rc5-00004-g1cb405f #1
> > [    0.000000] [<c0014d48>] (unwind_backtrace+0x0/0xf8) from [<c00117d0>] (show_stack+0x10/0x14)
> > [    0.000000] [<c00117d0>] (show_stack+0x10/0x14) from [<c0363488>] (dump_stack+0x6c/0xac)
> > [    0.000000] [<c0363488>] (dump_stack+0x6c/0xac) from [<c001e330>] (warn_slowpath_common+0x64/0x88)
> > [    0.000000] [<c001e330>] (warn_slowpath_common+0x64/0x88) from [<c001e3e8>] (warn_slowpath_fmt+0x30/0x40)
> > [    0.000000] [<c001e3e8>] (warn_slowpath_fmt+0x30/0x40) from [<c005a1b4>] (irq_domain_associate+0x128/0x1a8)
> > [    0.000000] [<c005a1b4>] (irq_domain_associate+0x128/0x1a8) from [<c005a508>] (irq_domain_associate_many+0x30/0x3c
> > )
> > [    0.000000] [<c005a508>] (irq_domain_associate_many+0x30/0x3c) from [<c005a768>] (irq_domain_add_simple+0x78/0x90)
> > [    0.000000] [<c005a768>] (irq_domain_add_simple+0x78/0x90) from [<c04b044c>] (combiner_of_init+0xb4/0x198)
> > [    0.000000] [<c04b044c>] (combiner_of_init+0xb4/0x198) from [<c04b6938>] (of_irq_init+0x278/0x2a0)
> > [    0.000000] [<c04b6938>] (of_irq_init+0x278/0x2a0) from [<c049b8fc>] (start_kernel+0x18c/0x384)
> > [    0.000000] [<c049b8fc>] (start_kernel+0x18c/0x384) from [<40008074>] (0x40008074)
> > [    0.000000] ---[ end trace 1b75b31a2719edce ]---
> > [    0.000000] ------------[ cut here ]------------
> > </snippet>
> This will be fixed in 3.13.
> 
> Now you can just change  "irq_base = 160" to  "irq_base = 256"
> in "static int __init combiner_of_init(struct device_node *np, struct 
> device_node *parent)" function
> in "drivers/irqchip/exynos-combiner.c"

	Thanks, this works for me!

--
Aliaksei

> 
> Best regards,
>      Tarek Dakhran
> 
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