1 files changed, 16 insertions, 7 deletions

diff --git a/drivers/i2c/chips/pca9539.c b/drivers/i2c/chips/pca9539.c
index 54b6e6a4beed..f43c4e79b55e 100644
--- a/drivers/i2c/chips/pca9539.c
+++ b/drivers/i2c/chips/pca9539.c
@@ -134,11 +134,13 @@ static int pca9539_detect(struct i2c_adapter *adapter, int address, int kind)
         new_client->driver = &pca9539_driver;
         new_client->flags = 0;
 
-        /* Detection: the pca9539 only has 8 registers (0-7).
-           A read of 7 should succeed, but a read of 8 should fail. */
-        if ((i2c_smbus_read_byte_data(new_client, 7) < 0) ||
-            (i2c_smbus_read_byte_data(new_client, 8) >= 0))
-                goto exit_kfree;
+        if (kind < 0) {
+                /* Detection: the pca9539 only has 8 registers (0-7).
+                   A read of 7 should succeed, but a read of 8 should fail. */
+                if ((i2c_smbus_read_byte_data(new_client, 7) < 0) ||
+                    (i2c_smbus_read_byte_data(new_client, 8) >= 0))
+                        goto exit_kfree;
+        }
 
         strlcpy(new_client->name, "pca9539", I2C_NAME_SIZE);
 
@@ -146,11 +148,16 @@ static int pca9539_detect(struct i2c_adapter *adapter, int address, int kind)
         if ((err = i2c_attach_client(new_client)))
                 goto exit_kfree;
 
-        /* Register sysfs hooks (don't care about failure) */
-        sysfs_create_group(&new_client->dev.kobj, &pca9539_defattr_group);
+        /* Register sysfs hooks */
+        err = sysfs_create_group(&new_client->dev.kobj,
+                                 &pca9539_defattr_group);
+        if (err)
+                goto exit_detach;
 
         return 0;
 
+exit_detach:
+        i2c_detach_client(new_client);
 exit_kfree:
         kfree(data);
 exit:
@@ -161,6 +168,8 @@ static int pca9539_detach_client(struct i2c_client *client)
 {
         int err;
 
+        sysfs_remove_group(&client->dev.kobj, &pca9539_defattr_group);
+
         if ((err = i2c_detach_client(client)))
                 return err;