linux-kernel - Re: [PATCH 1/3] iio: st_sensors: Init trigger before irq request

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Message-ID: <CACRpkdYV3nBbOh++bca7+5uhKt5Ct7ev5M8ZuvQ8OrPP+JPrdQ@mail.gmail.com>
Date:	Tue, 24 May 2016 13:27:06 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Crestez Dan Leonard <leonard.crestez@...el.com>
Cc:	Jonathan Cameron <jic23@...nel.org>,
	"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald-Stadler <pmeerw@...erw.net>,
	Daniel Baluta <daniel.baluta@...el.com>,
	Giuseppe Barba <giuseppe.barba@...com>,
	Denis Ciocca <denis.ciocca@...com>
Subject: Re: [PATCH 1/3] iio: st_sensors: Init trigger before irq request

On Fri, May 13, 2016 at 8:43 PM, Crestez Dan Leonard
<leonard.crestez@...el.com> wrote:

> This fixes a possible race where an interrupt arrives before complete
> initialization and crashes because iio_trigger_get_drvdata returns NULL.
>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Giuseppe Barba <giuseppe.barba@...com>
> Cc: Denis Ciocca <denis.ciocca@...com>
> Signed-off-by: Crestez Dan Leonard <leonard.crestez@...el.com>
> ---
> I ran into this while breaking the driver. But since the interrupt line can be
> shared the handler should always be able to accept and ignore a call.

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

However I think my patch fixing the thread issue will collide
by being close in context to this so it'd be great if you
could resend it on top of
"iio: st_sensors: switch to a threaded interrupt"?

Yours,
Linus Walleij