Re: drivers/power/wm831x_power.c:569:7-27: ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT

[Sasha Levin <sasha.levin@oracle.com>]

Hi folks,

I'm slightly confused about the bisection: it points out to a gcc5
support patch, what does it have to do with wm831x?


Thanks,
Sasha

On 09/22/2015 01:28 PM, Valentin Rothberg wrote:
> Hi Sasha,
> 
> Julia forwarded the report (see below) to me.  Unless
> IRQCHIP_ONESHOT_SAFE is set, requesting a threaded IRQ will always fail
> when the primary handler is set to NULL.  In some cases there's a
> potential to run into stack overflows.
> 
> I attached a patch that fixes the issue.
> 
> Kind regards,
>  Valentin
> 
> ---------- Forwarded message ----------
> Date: Tue, 22 Sep 2015 21:42:18 +0800
> From: kbuild test robot <fengguang.wu@intel.com>
> To: kbuild@01.org
> Cc: Julia Lawall <julia.lawall@lip6.fr>
> Subject: drivers/power/wm831x_power.c:569:7-27: ERROR: Threaded IRQ with no
>     primary handler requested without IRQF_ONESHOT
> 
> TO: Sasha Levin <sasha.levin@oracle.com>
> CC: kbuild-all@01.org
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: Linux Memory Management List <linux-mm@kvack.org>
> 
> Hi Sasha,
> 
> First bad commit (maybe != root cause):
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   bcee19f424a0d8c26ecf2607b73c690802658b29
> commit: 71458cfc782eafe4b27656e078d379a34e472adf kernel: add support for gcc 5
> date:   11 months ago
> :::::: branch date: 12 hours ago
> :::::: commit date: 11 months ago
> 
>>> drivers/power/wm831x_power.c:569:7-27: ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT
>    drivers/power/wm831x_power.c:579:7-27: ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT
>    drivers/power/wm831x_power.c:592:8-28: ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT
> --
>>> drivers/power/88pm860x_battery.c:243:1-4: WARNING: end returns can be simpified if negative or 0 value
> 
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git remote update linus
> git checkout 71458cfc782eafe4b27656e078d379a34e472adf
> vim +569 drivers/power/wm831x_power.c
> 
> 35c3ae5e Mark Brown 2011-08-16  553  	if (ret < 0)
> 35c3ae5e Mark Brown 2011-08-16  554  		goto err_wall;
> 35c3ae5e Mark Brown 2011-08-16  555  	power->have_battery = ret & WM831X_CHG_ENA;
> 35c3ae5e Mark Brown 2011-08-16  556
> 35c3ae5e Mark Brown 2011-08-16  557  	if (power->have_battery) {
> 35c3ae5e Mark Brown 2011-08-16  558  		    battery->name = power->battery_name;
> 35c3ae5e Mark Brown 2011-08-16  559  		    battery->properties = wm831x_bat_props;
> 35c3ae5e Mark Brown 2011-08-16  560  		    battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
> 35c3ae5e Mark Brown 2011-08-16  561  		    battery->get_property = wm831x_bat_get_prop;
> 35c3ae5e Mark Brown 2011-08-16  562  		    battery->use_for_apm = 1;
> 35c3ae5e Mark Brown 2011-08-16  563  		    ret = power_supply_register(&pdev->dev, battery);
> 35c3ae5e Mark Brown 2011-08-16  564  		    if (ret)
> 35c3ae5e Mark Brown 2011-08-16  565  			    goto err_usb;
> 35c3ae5e Mark Brown 2011-08-16  566  	}
> 3961f7c3 Mark Brown 2009-08-10  567
> cd99758b Mark Brown 2012-05-14  568  	irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO"));
> b5874f33 Mark Brown 2010-03-10 @569  	ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq,
> b5874f33 Mark Brown 2010-03-10  570  				   IRQF_TRIGGER_RISING, "System power low",
> 3961f7c3 Mark Brown 2009-08-10  571  				   power);
> 3961f7c3 Mark Brown 2009-08-10  572  	if (ret != 0) {
> 3961f7c3 Mark Brown 2009-08-10  573  		dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
> 3961f7c3 Mark Brown 2009-08-10  574  			irq, ret);
> 35c3ae5e Mark Brown 2011-08-16  575  		goto err_battery;
> 3961f7c3 Mark Brown 2009-08-10  576  	}
> 3961f7c3 Mark Brown 2009-08-10  577
> 
> :::::: The code at line 569 was first introduced by commit
> :::::: b5874f33bbaf00586d05de37706491ee37057e11 wm831x_power: Use genirq
> 
> :::::: TO: Mark Brown <broonie@opensource.wolfsonmicro.com>
> :::::: CC: Anton Vorontsov <cbouatmailru@gmail.com>
> 
> ---
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