hwmon: (pmbus) Convert pmbus drivers to use devm_kzalloc

Marginally less code and eliminate the possibility of memory leaks.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

8 files changed, 56 insertions, 154 deletions

diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index fe52c3cf87ba..f81cb4adaeba 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -229,7 +229,8 @@ static int adm1275_probe(struct i2c_client *client,
         if (device_config < 0)
                 return device_config;
 
-        data = kzalloc(sizeof(struct adm1275_data), GFP_KERNEL);
+        data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
+                            GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
@@ -297,23 +298,12 @@ static int adm1275_probe(struct i2c_client *client,
                 break;
         }
 
-        ret = pmbus_do_probe(client, id, info);
-        if (ret)
-                goto err_mem;
-        return 0;
-
-err_mem:
-        kfree(data);
-        return ret;
+        return pmbus_do_probe(client, id, info);
 }
 
 static int adm1275_remove(struct i2c_client *client)
 {
-        const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
-        const struct adm1275_data *data = to_adm1275_data(info);
-
         pmbus_do_remove(client);
-        kfree(data);
         return 0;
 }
 
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
index 86ac15ade6ab..e70d4ca14fbe 100644
--- a/drivers/hwmon/pmbus/lm25066.c
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -176,7 +176,6 @@ static int lm25066_probe(struct i2c_client *client,
                           const struct i2c_device_id *id)
 {
         int config;
-        int ret;
         struct lm25066_data *data;
         struct pmbus_driver_info *info;
 
@@ -184,15 +183,14 @@ static int lm25066_probe(struct i2c_client *client,
                                      I2C_FUNC_SMBUS_READ_BYTE_DATA))
                 return -ENODEV;
 
-        data = kzalloc(sizeof(struct lm25066_data), GFP_KERNEL);
+        data = devm_kzalloc(&client->dev, sizeof(struct lm25066_data),
+                            GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
         config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
-        if (config < 0) {
-                ret = config;
-                goto err_mem;
-        }
+        if (config < 0)
+                return config;
 
         data->id = id->driver_data;
         info = &data->info;
@@ -291,27 +289,15 @@ static int lm25066_probe(struct i2c_client *client,
                 }
                 break;
         default:
-                ret = -ENODEV;
-                goto err_mem;
+                return -ENODEV;
         }
 
-        ret = pmbus_do_probe(client, id, info);
-        if (ret)
-                goto err_mem;
-        return 0;
-
-err_mem:
-        kfree(data);
-        return ret;
+        return pmbus_do_probe(client, id, info);
 }
 
 static int lm25066_remove(struct i2c_client *client)
 {
-        const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
-        const struct lm25066_data *data = to_lm25066_data(info);
-
         pmbus_do_remove(client);
-        kfree(data);
         return 0;
 }
 
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index c9e4dd20bf9c..5e07a363b3e9 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -287,7 +287,7 @@ MODULE_DEVICE_TABLE(i2c, ltc2978_id);
 static int ltc2978_probe(struct i2c_client *client,
                          const struct i2c_device_id *id)
 {
-        int chip_id, ret, i;
+        int chip_id, i;
         struct ltc2978_data *data;
         struct pmbus_driver_info *info;
 
@@ -295,15 +295,14 @@ static int ltc2978_probe(struct i2c_client *client,
                                      I2C_FUNC_SMBUS_READ_WORD_DATA))
                 return -ENODEV;
 
-        data = kzalloc(sizeof(struct ltc2978_data), GFP_KERNEL);
+        data = devm_kzalloc(&client->dev, sizeof(struct ltc2978_data),
+                            GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
         chip_id = i2c_smbus_read_word_data(client, LTC2978_MFR_SPECIAL_ID);
-        if (chip_id < 0) {
-                ret = chip_id;
-                goto err_mem;
-        }
+        if (chip_id < 0)
+                return chip_id;
 
         if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2) {
                 data->id = ltc2978;
@@ -311,8 +310,7 @@ static int ltc2978_probe(struct i2c_client *client,
                 data->id = ltc3880;
         } else {
                 dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
-                ret = -ENODEV;
-                goto err_mem;
+                return -ENODEV;
         }
         if (data->id != id->driver_data)
                 dev_warn(&client->dev,
@@ -357,27 +355,15 @@ static int ltc2978_probe(struct i2c_client *client,
                 data->vout_min[1] = 0xffff;
                 break;
         default:
-                ret = -ENODEV;
-                goto err_mem;
+                return -ENODEV;
         }
 
-        ret = pmbus_do_probe(client, id, info);
-        if (ret)
-                goto err_mem;
-        return 0;
-
-err_mem:
-        kfree(data);
-        return ret;
+        return pmbus_do_probe(client, id, info);
 }
 
 static int ltc2978_remove(struct i2c_client *client)
 {
-        const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
-        const struct ltc2978_data *data = to_ltc2978_data(info);
-
         pmbus_do_remove(client);
-        kfree(data);
         return 0;
 }
 
diff --git a/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c
index da5fe361a940..b94bec23d95c 100644
--- a/drivers/hwmon/pmbus/pmbus.c
+++ b/drivers/hwmon/pmbus/pmbus.c
@@ -166,32 +166,21 @@ static int pmbus_probe(struct i2c_client *client,
                        const struct i2c_device_id *id)
 {
         struct pmbus_driver_info *info;
-        int ret;
 
-        info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
+        info = devm_kzalloc(&client->dev, sizeof(struct pmbus_driver_info),
+                            GFP_KERNEL);
         if (!info)
                 return -ENOMEM;
 
         info->pages = id->driver_data;
         info->identify = pmbus_identify;
 
-        ret = pmbus_do_probe(client, id, info);
-        if (ret < 0)
-                goto out;
-        return 0;
-
-out:
-        kfree(info);
-        return ret;
+        return pmbus_do_probe(client, id, info);
 }
 
 static int pmbus_remove(struct i2c_client *client)
 {
-        const struct pmbus_driver_info *info;
-
-        info = pmbus_get_driver_info(client);
         pmbus_do_remove(client);
-        kfree(info);
         return 0;
 }
 
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
index f571388d88fd..26b6542a90cd 100644
--- a/drivers/hwmon/pmbus/pmbus_core.c
+++ b/drivers/hwmon/pmbus/pmbus_core.c
@@ -1676,7 +1676,7 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
                                      | I2C_FUNC_SMBUS_WORD_DATA))
                 return -ENODEV;
 
-        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
         if (!data) {
                 dev_err(&client->dev, "No memory to allocate driver data\n");
                 return -ENOMEM;
@@ -1688,8 +1688,7 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
         /* Bail out if PMBus status register does not exist. */
         if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0) {
                 dev_err(&client->dev, "PMBus status register not found\n");
-                ret = -ENODEV;
-                goto out_data;
+                return -ENODEV;
         }
 
         if (pdata)
@@ -1702,50 +1701,49 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
                 ret = (*info->identify)(client, info);
                 if (ret < 0) {
                         dev_err(&client->dev, "Chip identification failed\n");
-                        goto out_data;
+                        return ret;
                 }
         }
 
         if (info->pages <= 0 || info->pages > PMBUS_PAGES) {
                 dev_err(&client->dev, "Bad number of PMBus pages: %d\n",
                         info->pages);
-                ret = -ENODEV;
-                goto out_data;
+                return -ENODEV;
         }
 
         ret = pmbus_identify_common(client, data);
         if (ret < 0) {
                 dev_err(&client->dev, "Failed to identify chip capabilities\n");
-                goto out_data;
+                return ret;
         }
 
         ret = -ENOMEM;
-        data->sensors = kzalloc(sizeof(struct pmbus_sensor) * data->max_sensors,
-                                GFP_KERNEL);
+        data->sensors = devm_kzalloc(&client->dev, sizeof(struct pmbus_sensor)
+                                     * data->max_sensors, GFP_KERNEL);
         if (!data->sensors) {
                 dev_err(&client->dev, "No memory to allocate sensor data\n");
-                goto out_data;
+                return -ENOMEM;
         }
 
-        data->booleans = kzalloc(sizeof(struct pmbus_boolean)
+        data->booleans = devm_kzalloc(&client->dev, sizeof(struct pmbus_boolean)
                                  * data->max_booleans, GFP_KERNEL);
         if (!data->booleans) {
                 dev_err(&client->dev, "No memory to allocate boolean data\n");
-                goto out_sensors;
+                return -ENOMEM;
         }
 
-        data->labels = kzalloc(sizeof(struct pmbus_label) * data->max_labels,
-                               GFP_KERNEL);
+        data->labels = devm_kzalloc(&client->dev, sizeof(struct pmbus_label)
+                                    * data->max_labels, GFP_KERNEL);
         if (!data->labels) {
                 dev_err(&client->dev, "No memory to allocate label data\n");
-                goto out_booleans;
+                return -ENOMEM;
         }
 
-        data->attributes = kzalloc(sizeof(struct attribute *)
-                                   * data->max_attributes, GFP_KERNEL);
+        data->attributes = devm_kzalloc(&client->dev, sizeof(struct attribute *)
+                                        * data->max_attributes, GFP_KERNEL);
         if (!data->attributes) {
                 dev_err(&client->dev, "No memory to allocate attribute data\n");
-                goto out_labels;
+                return -ENOMEM;
         }
 
         pmbus_find_attributes(client, data);
@@ -1756,8 +1754,7 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
          */
         if (!data->num_attributes) {
                 dev_err(&client->dev, "No attributes found\n");
-                ret = -ENODEV;
-                goto out_attributes;
+                return -ENODEV;
         }
 
         /* Register sysfs hooks */
@@ -1765,7 +1762,7 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
         ret = sysfs_create_group(&client->dev.kobj, &data->group);
         if (ret) {
                 dev_err(&client->dev, "Failed to create sysfs entries\n");
-                goto out_attributes;
+                return ret;
         }
         data->hwmon_dev = hwmon_device_register(&client->dev);
         if (IS_ERR(data->hwmon_dev)) {
@@ -1777,16 +1774,6 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
 
 out_hwmon_device_register:
         sysfs_remove_group(&client->dev.kobj, &data->group);
-out_attributes:
-        kfree(data->attributes);
-out_labels:
-        kfree(data->labels);
-out_booleans:
-        kfree(data->booleans);
-out_sensors:
-        kfree(data->sensors);
-out_data:
-        kfree(data);
         return ret;
 }
 EXPORT_SYMBOL_GPL(pmbus_do_probe);
@@ -1796,11 +1783,6 @@ void pmbus_do_remove(struct i2c_client *client)
         struct pmbus_data *data = i2c_get_clientdata(client);
         hwmon_device_unregister(data->hwmon_dev);
         sysfs_remove_group(&client->dev.kobj, &data->group);
-        kfree(data->attributes);
-        kfree(data->labels);
-        kfree(data->booleans);
-        kfree(data->sensors);
-        kfree(data);
 }
 EXPORT_SYMBOL_GPL(pmbus_do_remove);
 
diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c
index 759a563de636..e0573459447c 100644
--- a/drivers/hwmon/pmbus/ucd9000.c
+++ b/drivers/hwmon/pmbus/ucd9000.c
@@ -155,7 +155,8 @@ static int ucd9000_probe(struct i2c_client *client,
                            "Device mismatch: Configured %s, detected %s\n",
                            id->name, mid->name);
 
-        data = kzalloc(sizeof(struct ucd9000_data), GFP_KERNEL);
+        data = devm_kzalloc(&client->dev, sizeof(struct ucd9000_data),
+                            GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
         info = &data->info;
@@ -164,13 +165,12 @@ static int ucd9000_probe(struct i2c_client *client,
         if (ret < 0) {
                 dev_err(&client->dev,
                         "Failed to read number of active pages\n");
-                goto out;
+                return ret;
         }
         info->pages = ret;
         if (!info->pages) {
                 dev_err(&client->dev, "No pages configured\n");
-                ret = -ENODEV;
-                goto out;
+                return -ENODEV;
         }
 
         /* The internal temperature sensor is always active */
@@ -181,8 +181,7 @@ static int ucd9000_probe(struct i2c_client *client,
                                         block_buffer);
         if (ret <= 0) {
                 dev_err(&client->dev, "Failed to read configuration data\n");
-                ret = -ENODEV;
-                goto out;
+                return -ENODEV;
         }
         for (i = 0; i < ret; i++) {
                 int page = UCD9000_MON_PAGE(block_buffer[i]);
@@ -218,7 +217,7 @@ static int ucd9000_probe(struct i2c_client *client,
                                                         UCD9000_FAN_CONFIG,
                                                         data->fan_data[i]);
                         if (ret < 0)
-                                goto out;
+                                return ret;
                 }
                 i2c_smbus_write_byte_data(client, UCD9000_FAN_CONFIG_INDEX, 0);
 
@@ -227,23 +226,12 @@ static int ucd9000_probe(struct i2c_client *client,
                   | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34;
         }
 
-        ret = pmbus_do_probe(client, mid, info);
-        if (ret < 0)
-                goto out;
-        return 0;
-
-out:
-        kfree(data);
-        return ret;
+        return pmbus_do_probe(client, mid, info);
 }
 
 static int ucd9000_remove(struct i2c_client *client)
 {
-        struct ucd9000_data *data;
-
-        data = to_ucd9000_data(pmbus_get_driver_info(client));
         pmbus_do_remove(client);
-        kfree(data);
         return 0;
 }
 
diff --git a/drivers/hwmon/pmbus/ucd9200.c b/drivers/hwmon/pmbus/ucd9200.c
index 629d0c93cac6..c0d41b993a53 100644
--- a/drivers/hwmon/pmbus/ucd9200.c
+++ b/drivers/hwmon/pmbus/ucd9200.c
@@ -81,7 +81,8 @@ static int ucd9200_probe(struct i2c_client *client,
                            "Device mismatch: Configured %s, detected %s\n",
                            id->name, mid->name);
 
-        info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
+        info = devm_kzalloc(&client->dev, sizeof(struct pmbus_driver_info),
+                            GFP_KERNEL);
         if (!info)
                 return -ENOMEM;
 
@@ -89,7 +90,7 @@ static int ucd9200_probe(struct i2c_client *client,
                                         block_buffer);
         if (ret < 0) {
                 dev_err(&client->dev, "Failed to read phase information\n");
-                goto out;
+                return ret;
         }
 
         /*
@@ -106,8 +107,7 @@ static int ucd9200_probe(struct i2c_client *client,
         }
         if (!info->pages) {
                 dev_err(&client->dev, "No rails configured\n");
-                ret = -ENODEV;
-                goto out;
+                return -ENODEV;
         }
         dev_info(&client->dev, "%d rails configured\n", info->pages);
 
@@ -137,7 +137,7 @@ static int ucd9200_probe(struct i2c_client *client,
                 if (ret < 0) {
                         dev_err(&client->dev,
                                 "Failed to initialize PHASE registers\n");
-                        goto out;
+                        return ret;
                 }
         }
         if (info->pages > 1)
@@ -160,22 +160,12 @@ static int ucd9200_probe(struct i2c_client *client,
         if (mid->driver_data == ucd9240)
                 info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12;
 
-        ret = pmbus_do_probe(client, mid, info);
-        if (ret < 0)
-                goto out;
-        return 0;
-out:
-        kfree(info);
-        return ret;
+        return pmbus_do_probe(client, mid, info);
 }
 
 static int ucd9200_remove(struct i2c_client *client)
 {
-        const struct pmbus_driver_info *info;
-
-        info = pmbus_get_driver_info(client);
         pmbus_do_remove(client);
-        kfree(info);
         return 0;
 }
 
diff --git a/drivers/hwmon/pmbus/zl6100.c b/drivers/hwmon/pmbus/zl6100.c
index 8ae658118bec..9d3b84535e73 100644
--- a/drivers/hwmon/pmbus/zl6100.c
+++ b/drivers/hwmon/pmbus/zl6100.c
@@ -193,7 +193,8 @@ static int zl6100_probe(struct i2c_client *client,
                            "Device mismatch: Configured %s, detected %s\n",
                            id->name, mid->name);
 
-        data = kzalloc(sizeof(struct zl6100_data), GFP_KERNEL);
+        data = devm_kzalloc(&client->dev, sizeof(struct zl6100_data),
+                            GFP_KERNEL);
         if (!data)
                 return -ENOMEM;
 
@@ -223,7 +224,8 @@ static int zl6100_probe(struct i2c_client *client,
 
         ret = i2c_smbus_read_word_data(client, ZL6100_MFR_CONFIG);
         if (ret < 0)
-                goto err_mem;
+                return ret;
+
         if (ret & ZL6100_MFR_XTEMP_ENABLE)
                 info->func[0] |= PMBUS_HAVE_TEMP2;
 
@@ -235,23 +237,12 @@ static int zl6100_probe(struct i2c_client *client,
         info->write_word_data = zl6100_write_word_data;
         info->write_byte = zl6100_write_byte;
 
-        ret = pmbus_do_probe(client, mid, info);
-        if (ret)
-                goto err_mem;
-        return 0;
-
-err_mem:
-        kfree(data);
-        return ret;
+        return pmbus_do_probe(client, mid, info);
 }
 
 static int zl6100_remove(struct i2c_client *client)
 {
-        const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
-        const struct zl6100_data *data = to_zl6100_data(info);
-
         pmbus_do_remove(client);
-        kfree(data);
         return 0;
 }