charger-manager : Replace kzalloc to devm_kzalloc and remove uneccessary code

Use devm function for dynamic memory allocation.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>

1 files changed, 27 insertions, 58 deletions

diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index e30e847600bb..7287c0efd6bf 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -1378,7 +1378,8 @@ static int charger_manager_register_sysfs(struct charger_manager *cm)
                 charger = &desc->charger_regulators[i];
 
                 snprintf(buf, 10, "charger.%d", i);
-                str = kzalloc(sizeof(char) * (strlen(buf) + 1), GFP_KERNEL);
+                str = devm_kzalloc(cm->dev,
+                                sizeof(char) * (strlen(buf) + 1), GFP_KERNEL);
                 if (!str) {
                         ret = -ENOMEM;
                         goto err;
@@ -1452,30 +1453,23 @@ static int charger_manager_probe(struct platform_device *pdev)
                         rtc_dev = NULL;
                         dev_err(&pdev->dev, "Cannot get RTC %s\n",
                                 g_desc->rtc_name);
-                        ret = -ENODEV;
-                        goto err_alloc;
+                        return -ENODEV;
                 }
         }
 
         if (!desc) {
                 dev_err(&pdev->dev, "No platform data (desc) found\n");
-                ret = -ENODEV;
-                goto err_alloc;
+                return -ENODEV;
         }
 
-        cm = kzalloc(sizeof(struct charger_manager), GFP_KERNEL);
-        if (!cm) {
-                ret = -ENOMEM;
-                goto err_alloc;
-        }
+        cm = devm_kzalloc(&pdev->dev,
+                        sizeof(struct charger_manager), GFP_KERNEL);
+        if (!cm)
+                return -ENOMEM;
 
         /* Basic Values. Unspecified are Null or 0 */
         cm->dev = &pdev->dev;
-        cm->desc = kmemdup(desc, sizeof(struct charger_desc), GFP_KERNEL);
-        if (!cm->desc) {
-                ret = -ENOMEM;
-                goto err_alloc_desc;
-        }
+        cm->desc = desc;
         cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */
 
         /*
@@ -1498,27 +1492,23 @@ static int charger_manager_probe(struct platform_device *pdev)
         }
 
         if (!desc->charger_regulators || desc->num_charger_regulators < 1) {
-                ret = -EINVAL;
                 dev_err(&pdev->dev, "charger_regulators undefined\n");
-                goto err_no_charger;
+                return -EINVAL;
         }
 
         if (!desc->psy_charger_stat || !desc->psy_charger_stat[0]) {
                 dev_err(&pdev->dev, "No power supply defined\n");
-                ret = -EINVAL;
-                goto err_no_charger_stat;
+                return -EINVAL;
         }
 
         /* Counting index only */
         while (desc->psy_charger_stat[i])
                 i++;
 
-        cm->charger_stat = kzalloc(sizeof(struct power_supply *) * (i + 1),
-                                   GFP_KERNEL);
-        if (!cm->charger_stat) {
-                ret = -ENOMEM;
-                goto err_no_charger_stat;
-        }
+        cm->charger_stat = devm_kzalloc(&pdev->dev,
+                                sizeof(struct power_supply *) * i, GFP_KERNEL);
+        if (!cm->charger_stat)
+                return -ENOMEM;
 
         for (i = 0; desc->psy_charger_stat[i]; i++) {
                 cm->charger_stat[i] = power_supply_get_by_name(
@@ -1526,8 +1516,7 @@ static int charger_manager_probe(struct platform_device *pdev)
                 if (!cm->charger_stat[i]) {
                         dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
                                 desc->psy_charger_stat[i]);
-                        ret = -ENODEV;
-                        goto err_chg_stat;
+                        return -ENODEV;
                 }
         }
 
@@ -1535,21 +1524,18 @@ static int charger_manager_probe(struct platform_device *pdev)
         if (!cm->fuel_gauge) {
                 dev_err(&pdev->dev, "Cannot find power supply \"%s\"\n",
                         desc->psy_fuel_gauge);
-                ret = -ENODEV;
-                goto err_chg_stat;
+                return -ENODEV;
         }
 
         if (desc->polling_interval_ms == 0 ||
             msecs_to_jiffies(desc->polling_interval_ms) <= CM_JIFFIES_SMALL) {
                 dev_err(&pdev->dev, "polling_interval_ms is too small\n");
-                ret = -EINVAL;
-                goto err_chg_stat;
+                return -EINVAL;
         }
 
         if (!desc->temperature_out_of_range) {
                 dev_err(&pdev->dev, "there is no temperature_out_of_range\n");
-                ret = -EINVAL;
-                goto err_chg_stat;
+                return -EINVAL;
         }
 
         if (!desc->charging_max_duration_ms ||
@@ -1570,14 +1556,13 @@ static int charger_manager_probe(struct platform_device *pdev)
         cm->charger_psy.name = cm->psy_name_buf;
 
         /* Allocate for psy properties because they may vary */
-        cm->charger_psy.properties = kzalloc(sizeof(enum power_supply_property)
+        cm->charger_psy.properties = devm_kzalloc(&pdev->dev,
+                                sizeof(enum power_supply_property)
                                 * (ARRAY_SIZE(default_charger_props) +
-                                NUM_CHARGER_PSY_OPTIONAL),
-                                GFP_KERNEL);
-        if (!cm->charger_psy.properties) {
-                ret = -ENOMEM;
-                goto err_chg_stat;
-        }
+                                NUM_CHARGER_PSY_OPTIONAL), GFP_KERNEL);
+        if (!cm->charger_psy.properties)
+                return -ENOMEM;
+
         memcpy(cm->charger_psy.properties, default_charger_props,
                 sizeof(enum power_supply_property) *
                 ARRAY_SIZE(default_charger_props));
@@ -1614,7 +1599,7 @@ static int charger_manager_probe(struct platform_device *pdev)
         if (ret) {
                 dev_err(&pdev->dev, "Cannot register charger-manager with name \"%s\"\n",
                         cm->charger_psy.name);
-                goto err_register;
+                return ret;
         }
 
         /* Register extcon device for charger cable */
@@ -1655,8 +1640,6 @@ err_reg_sysfs:
                 charger = &desc->charger_regulators[i];
                 sysfs_remove_group(&cm->charger_psy.dev->kobj,
                                 &charger->attr_g);
-
-                kfree(charger->attr_g.name);
         }
 err_reg_extcon:
         for (i = 0; i < desc->num_charger_regulators; i++) {
@@ -1674,16 +1657,7 @@ err_reg_extcon:
         }
 
         power_supply_unregister(&cm->charger_psy);
-err_register:
-        kfree(cm->charger_psy.properties);
-err_chg_stat:
-        kfree(cm->charger_stat);
-err_no_charger_stat:
-err_no_charger:
-        kfree(cm->desc);
-err_alloc_desc:
-        kfree(cm);
-err_alloc:
+
         return ret;
 }
 
@@ -1718,11 +1692,6 @@ static int charger_manager_remove(struct platform_device *pdev)
 
         try_charger_enable(cm, false);
 
-        kfree(cm->charger_psy.properties);
-        kfree(cm->charger_stat);
-        kfree(cm->desc);
-        kfree(cm);
-
         return 0;
 }