On Mon, Aug 24, 2015 at 08:07:44PM +0800, Peng Fan wrote:
> When the input key number is not valid one of
> '/sys/devices/soc0/gpio-keys/keys', need to report
> an error, but not continue.
>
> See the following example:
> root@yocto:/sys/devices/soc0/gpio-keys# cat keys
> 114-116
> root@yocto:/sys/devices/soc0/gpio-keys# echo 77 > keys
> root@yocto:/sys/devices/soc0/gpio-keys#
>
> we want 'echo 77 > keys' to report an error, but not
> silence to give us an fake illusion that all is 'ok'.
>
> Signed-off-by: Peng Fan <van.free...@gmail.com>
> Cc: Dmitry Torokhov <dmitry.torok...@gmail.com>
> Cc: Linus Walleij <linus.wall...@linaro.org>
> Cc: Alexander Stein <alexander.st...@systec-electronic.com>
> Cc: Tejun Heo <t...@kernel.org>
> Cc: Andrew Morton <a...@linux-foundation.org>
> Cc: Wolfram Sang <w...@the-dreams.de>
> Cc: Fabio Estevam <fabio.este...@freescale.com>
Applied, thank you.
> ---
> drivers/input/keyboard/gpio_keys.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/input/keyboard/gpio_keys.c
> b/drivers/input/keyboard/gpio_keys.c
> index ddf4045..b98f3b4 100644
> --- a/drivers/input/keyboard/gpio_keys.c
> +++ b/drivers/input/keyboard/gpio_keys.c
> @@ -239,6 +239,11 @@ static ssize_t gpio_keys_attr_store_helper(struct
> gpio_keys_drvdata *ddata,
> }
> }
>
> + if (i == ddata->pdata->nbuttons) {
> + error = -EINVAL;
> + goto out;
> + }
> +
> mutex_lock(&ddata->disable_lock);
>
> for (i = 0; i < ddata->pdata->nbuttons; i++) {
> --
> 1.8.4.5
>
--
Dmitry
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
