6 files changed, 3 insertions, 12 deletions

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 92b1782d0d8..f5acdaa5270 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -371,7 +371,7 @@ EXPORT_SYMBOL_GPL(pwm_free);
  */
 int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
 {
-        if (!pwm || period_ns == 0 || duty_ns > period_ns)
+        if (!pwm || duty_ns < 0 || period_ns <= 0 || duty_ns > period_ns)
                 return -EINVAL;
 
         return pwm->chip->ops->config(pwm->chip, pwm, duty_ns, period_ns);
diff --git a/drivers/pwm/pwm-bfin.c b/drivers/pwm/pwm-bfin.c
index d53c4e7941e..5da8e185e83 100644
--- a/drivers/pwm/pwm-bfin.c
+++ b/drivers/pwm/pwm-bfin.c
@@ -69,9 +69,6 @@ static int bfin_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         unsigned long period, duty;
         unsigned long long val;
 
-        if (duty_ns < 0 || duty_ns > period_ns)
-                return -EINVAL;
-
         val = (unsigned long long)get_sclk() * period_ns;
         do_div(val, NSEC_PER_SEC);
         period = val;
diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c
index bd5867a1c70..260c3a88564 100644
--- a/drivers/pwm/pwm-pxa.c
+++ b/drivers/pwm/pwm-pxa.c
@@ -70,9 +70,6 @@ static int pxa_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         unsigned long offset;
         int rc;
 
-        if (period_ns == 0 || duty_ns > period_ns)
-                return -EINVAL;
-
         offset = pwm->hwpwm ? 0x10 : 0;
 
         c = clk_get_rate(pc->clk);
diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
index e5187c0ade9..023a3bee76e 100644
--- a/drivers/pwm/pwm-samsung.c
+++ b/drivers/pwm/pwm-samsung.c
@@ -126,9 +126,6 @@ static int s3c_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         if (period_ns > NS_IN_HZ || duty_ns > NS_IN_HZ)
                 return -ERANGE;
 
-        if (duty_ns > period_ns)
-                return -EINVAL;
-
         if (period_ns == s3c->period_ns &&
             duty_ns == s3c->duty_ns)
                 return 0;
diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c
index 081471fbb09..d6d4cf05565 100644
--- a/drivers/pwm/pwm-tiecap.c
+++ b/drivers/pwm/pwm-tiecap.c
@@ -60,7 +60,7 @@ static int ecap_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         unsigned long period_cycles, duty_cycles;
         unsigned int reg_val;
 
-        if (period_ns < 0 || duty_ns < 0 || period_ns > NSEC_PER_SEC)
+        if (period_ns > NSEC_PER_SEC)
                 return -ERANGE;
 
         c = pc->clk_rate;
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index caf00feadc6..d3c1dff0a0d 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -221,7 +221,7 @@ static int ehrpwm_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         unsigned short ps_divval, tb_divval;
         int i, cmp_reg;
 
-        if (period_ns < 0 || duty_ns < 0 || period_ns > NSEC_PER_SEC)
+        if (period_ns > NSEC_PER_SEC)
                 return -ERANGE;
 
         c = pc->clk_rate;