linux-kernel - Re: sharp c-3000 aka spitz: fix warn

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Message-ID: <20100107065230.GA1303@ucw.cz>
Date:	Thu, 7 Jan 2010 07:52:32 +0100
From:	Pavel Machek <pavel@....cz>
To:	Eric Miao <eric.y.miao@...il.com>, dtor@...l.ru,
	linux-input@...r.kernel.org
Cc:	rpurdie@...ys.net, lenz@...wisc.edu,
	kernel list <linux-kernel@...r.kernel.org>,
	Dirk@...er-online.de, arminlitzel@....de,
	Cyril Hrubis <metan@....cz>, thommycheck@...il.com,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	dbaryshkov@...il.com, omegamoon@...il.com, utx@...guin.cz,
	zaurus-devel@...ts.linuxtogo.org,
	"Rafael J. Wysocki" <rjw@...k.pl>, Andrew Morton <akpm@...l.org>
Subject: Re: sharp c-3000 aka spitz: fix warn_on introduced in 2.6.32-rc1

On Wed 2010-01-06 15:17:39, Eric Miao wrote:
> On Wed, Jan 6, 2010 at 3:10 PM, Pavel Machek <pavel@....cz> wrote:
> >
> > Sharp-SL code uses strange, complex grouping of gpios for wakeups
> > toggling. Fortunately, it is unneeded in recent kernels (and actually
> > provokes WARN_ONs during resume). Remove it.
> >
> > Signed-off-by: Pavel Machek <pavel@....cz>
> 
> Pavel,
> 
> The code to be removed below is used to support pxa27x_keypad
> to be able to resume from sleep. What's the exact reason to remove
> this on spitz?

Well, otherwise I get this during resume: (2.6.32 regression)

(and similar for matrix-keypad, but dmitry worked around that
already).

Problem is that gpio-keys and matrix-keypad want to set_wake for each
gpio individually, hw can do that, but pxa27x.c breaks it.

I don't get it; what is pxa27x_keypad used on? It looks like
matrix-keypad subset.

								Pavel

pxa2xx-spi pxa2xx-spi.2: resume
sharp-scoop sharp-scoop.0: resume
matrix-keypad matrix-keypad: resume
gpio-keys gpio-keys: resume
------------[ cut here ]------------
WARNING: at kernel/irq/manage.c:361 set_irq_wake+0x7c/0x138()
Unbalanced IRQ 191 wake disable
Modules linked in:
[<c0024900>] (unwind_backtrace+0x0/0xe4) from [<c00354f4>] (warn_slowpath_common+0x4c/0x80)
[<c00354f4>] (warn_slowpath_common+0x4c/0x80) from [<c0035564>] (warn_slowpath_fmt+0x28/0x38)
[<c0035564>] (warn_slowpath_fmt+0x28/0x38) from [<c00622f4>] (set_irq_wake+0x7c/0x138)
[<c00622f4>] (set_irq_wake+0x7c/0x138) from [<c01d2370>] (gpio_keys_resume+0x94/0xd0)
[<c01d2370>] (gpio_keys_resume+0x94/0xd0) from [<c0193a50>] (platform_pm_resume+0x30/0x54)
[<c0193a50>] (platform_pm_resume+0x30/0x54) from [<c01961e4>] (pm_op+0xa0/0xc0)
[<c01961e4>] (pm_op+0xa0/0xc0) from [<c0196c94>] (dpm_resume_end+0x100/0x474)
[<c0196c94>] (dpm_resume_end+0x100/0x474) from [<c005ef7c>] (suspend_devices_and_enter+0x8c/0x1dc)
[<c005ef7c>] (suspend_devices_and_enter+0x8c/0x1dc) from [<c005f1b4>] (enter_state+0xe8/0x120)
[<c005f1b4>] (enter_state+0xe8/0x120) from [<c005e8b8>] (state_store+0x90/0xc4)
[<c005e8b8>] (state_store+0x90/0xc4) from [<c01481a4>] (kobj_attr_store+0x1c/0x24)
[<c01481a4>] (kobj_attr_store+0x1c/0x24) from [<c00daab0>] (sysfs_write_file+0x104/0x18c)
[<c00daab0>] (sysfs_write_file+0x104/0x18c) from [<c00922cc>] (vfs_write+0xb0/0x164)
[<c00922cc>] (vfs_write+0xb0/0x164) from [<c0092450>] (sys_write+0x40/0x70)
[<c0092450>] (sys_write+0x40/0x70) from [<c001ff60>] (ret_fast_syscall+0x0/0x28)
---[ end trace d1b2070efbc838e4 ]---
leds-gpio leds-gpio: resume
sharpsl-nand sharpsl-nand: resume


-- 
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