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From: Jonathan Cameron <jic23@kernel.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	linux-iio <linux-iio@vger.kernel.org>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Subject: Re: [PATCH v2 1/5] iio: pressure: bmp280: Tolerate IRQ before registering
Date: Sat, 28 Mar 2020 16:02:03 +0000	[thread overview]
Message-ID: <20200328160203.1d0e378b@archlinux> (raw)
In-Reply-To: <CACRpkdagNP6cY353oi0vCAihqvd2ZOHJ8Os7j-cq4EVBCC4+Ug@mail.gmail.com>

On Fri, 27 Mar 2020 11:50:25 +0100
Linus Walleij <linus.walleij@linaro.org> wrote:

> On Mon, Mar 23, 2020 at 11:41 AM Andy Shevchenko
> <andriy.shevchenko@linux.intel.com> wrote:
> 
> > With DEBUG_SHIRQ enabled we have a kernel crash
> >
> > [  116.482696] BUG: kernel NULL pointer dereference, address: 0000000000000000
> >
> > ...
> >
> > [  116.606571] Call Trace:
> > [  116.609023]  <IRQ>
> > [  116.611047]  complete+0x34/0x50
> > [  116.614206]  bmp085_eoc_irq+0x9/0x10 [bmp280]
> >
> > because DEBUG_SHIRQ mechanism fires an IRQ before registration and drivers
> > ought to be able to handle an interrupt happening before request_irq() returns.
> >
> > Fixes: aae953949651 ("iio: pressure: bmp280: add support for BMP085 EOC interrupt")
> > Cc: Linus Walleij <linus.walleij@linaro.org>
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> > ---
> > v2: put conditional logic back when re-initializing completion (Jonathan)  
> 
> Acked-by: Linus Walleij <linus.walleij@linaro.org>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to poke at them.

Thanks,

Jonathan

> 
> Yours,
> Linus Walleij


      reply	other threads:[~2020-03-28 16:02 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 10:41 [PATCH v2 1/5] iio: pressure: bmp280: Tolerate IRQ before registering Andy Shevchenko
2020-03-23 10:41 ` [PATCH v2 2/5] iio: pressure: bmp280: Convert to use ->read_avail() Andy Shevchenko
2020-03-23 10:41 ` [PATCH v2 3/5] iio: pressure: bmp280: Explicitly mark GPIO optional Andy Shevchenko
2020-03-23 10:41 ` [PATCH v2 4/5] iio: pressure: bmp280: Drop unneeded explicit castings Andy Shevchenko
2020-03-23 10:41 ` [PATCH v2 5/5] iio: pressure: bmp280: Join string literals back Andy Shevchenko
2020-03-27 10:50 ` [PATCH v2 1/5] iio: pressure: bmp280: Tolerate IRQ before registering Linus Walleij
2020-03-28 16:02   ` Jonathan Cameron [this message]

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