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

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Message-ID: <1456220926-2217-1-git-send-email-dan.bogdan.nechita@gmail.com>
Date:	Tue, 23 Feb 2016 11:48:45 +0200
From:	Dan Bogdan Nechita <dan.bogdan.nechita@...il.com>
To:	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	Michael Hennerich <michael.hennerich@...log.com>,
	<linux-kernel@...r.kernel.org>,
	Dan Bogdan Nechita <dan.bogdan.nechita@...il.com>
Subject: [PATCH] misc: ad525x_dpot: Fix the enabling of the "otpXen" attributes

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>
---
 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);
-- 
1.7.9.5