diff options
| -rw-r--r-- | drivers/pwm/core.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 28cb6ab0f62d..5cf64b3a4cdf 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -411,9 +411,8 @@ static int __pwm_set_waveform(struct pwm_device *pwm, * possible/needed. In the above example requesting .period_length_ns = 94 and * @exact = true, you get the hardware configured with period = 93.5 ns. * - * Returns: 0 on success, 1 if was rounded up (if !@exact), -EDOM if setting - * failed due to the exact waveform not being possible (if @exact), or a - * different negative errno on failure. + * Returns: 0 on success, -EDOM if setting failed due to the exact waveform not + * being possible (if @exact), or a different negative errno on failure. * Context: May sleep. */ int pwm_set_waveform_might_sleep(struct pwm_device *pwm, @@ -442,14 +441,17 @@ int pwm_set_waveform_might_sleep(struct pwm_device *pwm, } /* - * map err == 1 to -EDOM for exact requests. Also make sure that -EDOM is - * only returned in exactly that case. Note that __pwm_set_waveform() - * should never return -EDOM which justifies the unlikely(). + * map err == 1 to -EDOM for exact requests and 0 for !exact ones. Also + * make sure that -EDOM is only returned in exactly that case. Note that + * __pwm_set_waveform() should never return -EDOM which justifies the + * unlikely(). */ if (unlikely(err == -EDOM)) err = -EINVAL; else if (exact && err == 1) err = -EDOM; + else if (err == 1) + err = 0; return err; } |