linux-kernel - Re: [patch 2.6.25-rc4] gpio/pca953x bugfix: mark as can

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Date:	Mon, 10 Mar 2008 13:14:35 +0800
From:	"eric miao" <eric.y.miao@...il.com>
To:	"David Brownell" <david-b@...bell.net>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Rtp Arnaud Patard" <arnaud.patard@...-net.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [patch 2.6.25-rc4] gpio/pca953x bugfix: mark as can_sleep

OK

On Mon, Mar 10, 2008 at 4:56 AM, David Brownell <david-b@...bell.net> wrote:
> The pca953x driver is an I2C driver so gpio_chip->can_sleep should be set.
>  This lets upper layers know they should use the gpio_*_cansleep() calls
>  to access values, and may not access them from nonsleeping contexts.
>
>  Signed-off-by: Arnaud Patard <arnaud.patard@...-net.org>
>  Signed-off-by: David Brownell <dbrownell@...rs.sourceforge.net>
>  ---
>  Merge before 2.6.25-final, please.  This will for example prevent
>  leds-gpio from issuing blocking I2C calls from timer/irq contexts.
>
>   drivers/gpio/pca953x.c |    1 +
>   1 file changed, 1 insertion(+)
>
>  --- g26.orig/drivers/gpio/pca953x.c     2008-03-08 11:17:22.000000000 -0800
>  +++ g26/drivers/gpio/pca953x.c  2008-03-09 13:51:13.000000000 -0700
>  @@ -184,6 +184,7 @@ static void pca953x_setup_gpio(struct pc
>         gc->direction_output = pca953x_gpio_direction_output;
>         gc->get = pca953x_gpio_get_value;
>         gc->set = pca953x_gpio_set_value;
>  +       gc->can_sleep = 1;
>
>         gc->base = chip->gpio_start;
>         gc->ngpio = gpios;
>



-- 
Cheers
- eric
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