Merge remote-tracking branch 'regulator/topic/core' into regulator-next

[sfrench/cifs-2.6.git] / drivers / regulator / core.c

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 9fecbd4e3546aeff60f9eddc6447b2d2d7c0981d..e9f74331fc697d86b723e1a69379d636c9fe9162 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1462,7 +1462,7 @@ static struct regulator_dev *regulator_lookup_by_name(const char *name)
 static struct regulator_dev *regulator_dev_lookup(struct device *dev,
                                                  const char *supply)
 {
-       struct regulator_dev *r;
+       struct regulator_dev *r = NULL;
        struct device_node *node;
        struct regulator_map *map;
        const char *devname = NULL;
@@ -1489,10 +1489,6 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
        if (dev)
                devname = dev_name(dev);
 
-       r = regulator_lookup_by_name(supply);
-       if (r)
-               return r;
-
        mutex_lock(&regulator_list_mutex);
        list_for_each_entry(map, &regulator_map_list, list) {
                /* If the mapping has a device set up it must match */
@@ -1508,6 +1504,10 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
        }
        mutex_unlock(&regulator_list_mutex);
 
+       if (r)
+               return r;
+
+       r = regulator_lookup_by_name(supply);
        if (r)
                return r;
 
@@ -4312,41 +4312,31 @@ void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data)
 EXPORT_SYMBOL_GPL(regulator_get_init_drvdata);
 
 #ifdef CONFIG_DEBUG_FS
-static ssize_t supply_map_read_file(struct file *file, char __user *user_buf,
-                                   size_t count, loff_t *ppos)
+static int supply_map_show(struct seq_file *sf, void *data)
 {
-       char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
-       ssize_t len, ret = 0;
        struct regulator_map *map;
 
-       if (!buf)
-               return -ENOMEM;
-
        list_for_each_entry(map, &regulator_map_list, list) {
-               len = snprintf(buf + ret, PAGE_SIZE - ret,
-                              "%s -> %s.%s\n",
-                              rdev_get_name(map->regulator), map->dev_name,
-                              map->supply);
-               if (len >= 0)
-                       ret += len;
-               if (ret > PAGE_SIZE) {
-                       ret = PAGE_SIZE;
-                       break;
-               }
+               seq_printf(sf, "%s -> %s.%s\n",
+                               rdev_get_name(map->regulator), map->dev_name,
+                               map->supply);
        }
 
-       ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
-
-       kfree(buf);
+       return 0;
+}
 
-       return ret;
+static int supply_map_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, supply_map_show, inode->i_private);
 }
 #endif
 
 static const struct file_operations supply_map_fops = {
 #ifdef CONFIG_DEBUG_FS
-       .read = supply_map_read_file,
-       .llseek = default_llseek,
+       .open = supply_map_open,
+       .read = seq_read,
+       .llseek = seq_lseek,
+       .release = single_release,
 #endif
 };