4 files changed, 15 insertions, 14 deletions

diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c
index 1c89d922d619..fa9708c2d723 100644
--- a/drivers/hwmon/amc6821.c
+++ b/drivers/hwmon/amc6821.c
@@ -686,7 +686,6 @@ static ssize_t set_fan1_div(
                 data->fan1_div = 4;
                 break;
         default:
-                mutex_unlock(&data->update_lock);
                 count = -EINVAL;
                 goto EXIT;
         }
diff --git a/drivers/hwmon/asus_atk0110.c b/drivers/hwmon/asus_atk0110.c
index 6811346c1c62..028284f544e3 100644
--- a/drivers/hwmon/asus_atk0110.c
+++ b/drivers/hwmon/asus_atk0110.c
@@ -1329,17 +1329,16 @@ static int atk_add(struct acpi_device *device)
                         &buf, ACPI_TYPE_PACKAGE);
         if (ret != AE_OK) {
                 dev_dbg(&device->dev, "atk: method MBIF not found\n");
-                err = -ENODEV;
-                goto out;
-        }
-
-        obj = buf.pointer;
-        if (obj->package.count >= 2 &&
-                        obj->package.elements[1].type == ACPI_TYPE_STRING) {
-                dev_dbg(&device->dev, "board ID = %s\n",
-                                obj->package.elements[1].string.pointer);
+        } else {
+                obj = buf.pointer;
+                if (obj->package.count >= 2) {
+                        union acpi_object *id = &obj->package.elements[1];
+                        if (id->type == ACPI_TYPE_STRING)
+                                dev_dbg(&device->dev, "board ID = %s\n",
+                                        id->string.pointer);
+                }
+                ACPI_FREE(buf.pointer);
         }
-        ACPI_FREE(buf.pointer);
 
         err = atk_probe_if(data);
         if (err) {
diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
index bd0fc67e804b..fa0728232e71 100644
--- a/drivers/hwmon/fschmd.c
+++ b/drivers/hwmon/fschmd.c
@@ -768,6 +768,7 @@ leave:
 static int watchdog_open(struct inode *inode, struct file *filp)
 {
         struct fschmd_data *pos, *data = NULL;
+        int watchdog_is_open;
 
         /* We get called from drivers/char/misc.c with misc_mtx hold, and we
            call misc_register() from fschmd_probe() with watchdog_data_mutex
@@ -782,10 +783,12 @@ static int watchdog_open(struct inode *inode, struct file *filp)
                 }
         }
         /* Note we can never not have found data, so we don't check for this */
-        kref_get(&data->kref);
+        watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
+        if (!watchdog_is_open)
+                kref_get(&data->kref);
         mutex_unlock(&watchdog_data_mutex);
 
-        if (test_and_set_bit(0, &data->watchdog_is_open))
+        if (watchdog_is_open)
                 return -EBUSY;
 
         /* Start the watchdog */
diff --git a/drivers/hwmon/smsc47m1.c b/drivers/hwmon/smsc47m1.c
index 9ca97818bd4b..8fa462f2b570 100644
--- a/drivers/hwmon/smsc47m1.c
+++ b/drivers/hwmon/smsc47m1.c
@@ -488,7 +488,7 @@ static int __init smsc47m1_find(unsigned short *addr,
 }
 
 /* Restore device to its initial state */
-static void __init smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
+static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
 {
         if ((sio_data->activate & 0x01) == 0) {
                 superio_enter();