linux-kernel - Re: [PATCH] Input: ar1021-i2c - fix too long name in driver's device table

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Date:   Tue, 13 Dec 2016 08:41:46 +0100
From:   Christian Gmeiner <christian.gmeiner@...il.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     linux-input <linux-input@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Jean Delvare <jdelvare@...e.com>, m.frohiky@...il.com
Subject: Re: [PATCH] Input: ar1021-i2c - fix too long name in driver's device table

2016-12-13 0:57 GMT+01:00 Dmitry Torokhov <dmitry.torokhov@...il.com>:
> The name field in structure i2c_device_id is 20 characters, and we
> expect it to be NULL-terminated, however we are trying to stuff it with
> 21 bytes and thus NULL-terminator is lost. This causes issues when one
> creates device with name "MICROCHIP_AR1021_I2C" as i2c core cuts off the
> last "C", and automatic module loading by alias does not work as result.
>
> The -I2C suffix in the device name is superfluous, we know what bus we
> are dealing with, so let's drop it.
>
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116211
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>  drivers/input/touchscreen/ar1021_i2c.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
> index 71b5a63..89f9587 100644
> --- a/drivers/input/touchscreen/ar1021_i2c.c
> +++ b/drivers/input/touchscreen/ar1021_i2c.c
> @@ -152,7 +152,7 @@ static int __maybe_unused ar1021_i2c_resume(struct device *dev)
>  static SIMPLE_DEV_PM_OPS(ar1021_i2c_pm, ar1021_i2c_suspend, ar1021_i2c_resume);
>
>  static const struct i2c_device_id ar1021_i2c_id[] = {
> -       { "MICROCHIP_AR1021_I2C", 0 },
> +       { "MICROCHIP_AR1021", 0 },
>         { },
>  };
>  MODULE_DEVICE_TABLE(i2c, ar1021_i2c_id);
> --
> 2.8.0.rc3.226.g39d4020
>

Reviewed-By: Christian Gmeiner <christian.gmeiner@...il.com>