linux-kernel - Re: [PATCHv6 08/11] i2c: match vendorless strings on the internal string length

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Message-ID: <20161026085316.GK8574@dell>
Date:   Wed, 26 Oct 2016 09:53:16 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Kieran Bingham <kieran@...uared.org.uk>
Cc:     Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Javier Martinez Canillas <javier@....samsung.com>,
        sameo@...ux.intel.com
Subject: Re: [PATCHv6 08/11] i2c: match vendorless strings on the internal
 string length

On Tue, 25 Oct 2016, Kieran Bingham wrote:

> If a user provides a shortened string to match a device to the sysfs i2c
> interface it will match on the first string that contains that string
> prefix.
> 
> for example:
>   echo a 0x68 > /sys/bus/i2c/devices/i2c-2/new_device
> 
> will match as3711, as3722, and ak8975 incorrectly.
> 
> Signed-off-by: Kieran Bingham <kieran@...gham.xyz>

Acked-by: Lee Jones <lee.jones@...aro.org>
  
> ---
>  drivers/i2c/i2c-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> index 01bce56f733a..50c9cfdb87b7 100644
> --- a/drivers/i2c/i2c-core.c
> +++ b/drivers/i2c/i2c-core.c
> @@ -1708,7 +1708,7 @@ i2c_of_match_device_strip_vendor(const struct of_device_id *matches,
>  		else
>  			name++;
>  
> -		if (!strncasecmp(client->name, name, strlen(client->name)))
> +		if (!strncasecmp(client->name, name, strlen(name)))
>  			return matches;
>  	}
>  

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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