[PATCH 3.16 165/192] misc: ad525x_dpot: Fix the enabling of the "otpXen" attributes

Ben Hutchings
2017-10-09T14:00:01Z

From: Dan Bogdan Nechita <dan.bogdan.nechita@gmail.com>

commit 1bb850a1b7f68b66361e658e334f9fdf8231f17d upstream.

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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/misc/ad525x_dpot.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/misc/ad525x_dpot.c
+++ b/drivers/misc/ad525x_dpot.c
@@ -457,7 +457,7 @@ static ssize_t sysfs_set_reg(struct devi
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);