linux-kernel - Re: [PATCH] misc: ad525x_dpot: Fix the enabling of the "otpXen" attributes

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Date:	Thu, 19 Nov 2015 09:22:59 +0100
From:	Michael Hennerich <michael.hennerich@...log.com>
To:	Dan Bogdan Nechita <dan.bogdan.nechita@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] misc: ad525x_dpot: Fix the enabling of the "otpXen"
 attributes

On 11/18/2015 05:16 PM, Dan Bogdan Nechita wrote:
> Currently writing the attributes with "echo" will result in comparing:
> "enabled\n" with "enabled\0" and attribute is always set to false.
>
> Use the sysfs_streq() instead because it treats both NUL and
> new-line-then-NUL as equivalent string terminations.
>
> Signed-off-by: Dan Bogdan Nechita <dan.bogdan.nechita@...il.com>

Acked-by: Michael Hennerich <michael.hennerich@...log.com>

> ---
>   drivers/misc/ad525x_dpot.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/misc/ad525x_dpot.c b/drivers/misc/ad525x_dpot.c
> index 15e8807..4230e6a 100644
> --- a/drivers/misc/ad525x_dpot.c
> +++ b/drivers/misc/ad525x_dpot.c
> @@ -452,7 +452,7 @@ static ssize_t sysfs_set_reg(struct device *dev,
>   	int err;
>
>   	if (reg & DPOT_ADDR_OTP_EN) {
> -		if (!strncmp(buf, "enabled", sizeof("enabled")))
> +		if (sysfs_streq(buf, "enabled"))
>   			set_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask);
>   		else
>   			clear_bit(DPOT_RDAC_MASK & reg, data->otp_en_mask);
>


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