diff options
Diffstat (limited to 'arch/arm/mach-pxa/pwm.c')
| -rw-r--r-- | arch/arm/mach-pxa/pwm.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/arch/arm/mach-pxa/pwm.c b/arch/arm/mach-pxa/pwm.c index 7c86dd1d108f..ce28cd9fed16 100644 --- a/arch/arm/mach-pxa/pwm.c +++ b/arch/arm/mach-pxa/pwm.c @@ -119,17 +119,23 @@ struct pwm_device *pwm_request(int pwm_id, const char *label) mutex_lock(&pwm_lock); list_for_each_entry(pwm, &pwm_list, node) { - if (pwm->pwm_id == pwm_id && pwm->use_count == 0) { - pwm->use_count++; - pwm->label = label; + if (pwm->pwm_id == pwm_id) { found = 1; break; } } - mutex_unlock(&pwm_lock); + if (found) { + if (pwm->use_count == 0) { + pwm->use_count++; + pwm->label = label; + } else + pwm = ERR_PTR(-EBUSY); + } else + pwm = ERR_PTR(-ENOENT); - return (found) ? pwm : NULL; + mutex_unlock(&pwm_lock); + return pwm; } EXPORT_SYMBOL(pwm_request); |