diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 329c5e3f333823..b5e7af60723c48 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -324,11 +324,11 @@ int update_devfreq(struct devfreq *devfreq) max_freq = min(devfreq->scaling_max_freq, devfreq->max_freq); min_freq = max(devfreq->scaling_min_freq, devfreq->min_freq); - if (min_freq && freq < min_freq) { + if (freq < min_freq) { freq = min_freq; flags &= ~DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use GLB */ } - if (max_freq && freq > max_freq) { + if (freq > max_freq) { freq = max_freq; flags |= DEVFREQ_FLAG_LEAST_UPPER_BOUND; /* Use LUB */ } @@ -1168,17 +1168,26 @@ static ssize_t min_freq_store(struct device *dev, struct device_attribute *attr, struct devfreq *df = to_devfreq(dev); unsigned long value; int ret; - unsigned long max; ret = sscanf(buf, "%lu", &value); if (ret != 1) return -EINVAL; mutex_lock(&df->lock); - max = df->max_freq; - if (value && max && value > max) { - ret = -EINVAL; - goto unlock; + + if (value) { + if (value > df->max_freq) { + ret = -EINVAL; + goto unlock; + } + } else { + unsigned long *freq_table = df->profile->freq_table; + + /* Get minimum frequency according to sorting order */ + if (freq_table[0] < freq_table[df->profile->max_state - 1]) + value = freq_table[0]; + else + value = freq_table[df->profile->max_state - 1]; } df->min_freq = value; @@ -1203,17 +1212,26 @@ static ssize_t max_freq_store(struct device *dev, struct device_attribute *attr, struct devfreq *df = to_devfreq(dev); unsigned long value; int ret; - unsigned long min; ret = sscanf(buf, "%lu", &value); if (ret != 1) return -EINVAL; mutex_lock(&df->lock); - min = df->min_freq; - if (value && min && value < min) { - ret = -EINVAL; - goto unlock; + + if (value) { + if (value < df->min_freq) { + ret = -EINVAL; + goto unlock; + } + } else { + unsigned long *freq_table = df->profile->freq_table; + + /* Get maximum frequency according to sorting order */ + if (freq_table[0] < freq_table[df->profile->max_state - 1]) + value = freq_table[df->profile->max_state - 1]; + else + value = freq_table[0]; } df->max_freq = value;