diff options
Diffstat (limited to 'drivers/pwm/pwm.c')
| -rw-r--r-- | drivers/pwm/pwm.c | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/drivers/pwm/pwm.c b/drivers/pwm/pwm.c index 44524228fe21..32e84f86bf62 100644 --- a/drivers/pwm/pwm.c +++ b/drivers/pwm/pwm.c @@ -39,28 +39,6 @@ static DEFINE_MUTEX(device_list_mutex); static struct class pwm_class; static struct workqueue_struct *pwm_handler_workqueue; -/* Function that checks for overflows */ -static int check_flow(const char *buf) -{ - - int i; - const char *overflow = "4294967295"; - - i = strcmp(buf, overflow); - pr_debug("buffer is "); - if (i < 0) - pr_debug("minor than"); - else if (i > 0) { - pr_debug("greater than"); - pr_err("This value is greater that 32-bit value.\n"); - return -EINVAL; - } else - pr_debug("equals to"); - pr_debug(" %s\n", overflow); - - return 0; -} - int pwm_register(struct pwm_device *pwm) { struct pwm_channel *p; @@ -513,13 +491,6 @@ static ssize_t pwm_duty_ns_store(struct device *dev, { unsigned long duty_ns; struct pwm_channel *p = dev_get_drvdata(dev); - int ret; - - ret = check_flow(buf); - if (ret) { - pr_err("Overflow or underflow detected.\n"); - return -EINVAL; - } if (1 == sscanf(buf, "%lu", &duty_ns)) pwm_set_duty_ns(p, duty_ns); @@ -539,13 +510,6 @@ static ssize_t pwm_period_ns_store(struct device *dev, { unsigned long period_ns; struct pwm_channel *p = dev_get_drvdata(dev); - int ret; - - ret = check_flow(buf); - if (ret) { - pr_err("Overflow or underflow detected.\n"); - return -EINVAL; - } if (1 == sscanf(buf, "%lu", &period_ns)) pwm_set_period_ns(p, period_ns); |