[PATCH] mfd: max8998 cleanups

[Axel Lin <axel.lin@gmail.com>]

This patch includes below fixes:
1. i2c_smbus_write_byte_data() returns zero or negative value,
   therefore no need to check if ret is greater than zero or not.
2. Properly free irq and unregister max8998->rtc device in
   max8998_i2c_probe() error path and max8998_i2c_remove().

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
 drivers/mfd/max8998.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/max8998.c b/drivers/mfd/max8998.c
index a720f41..bb9977b 100644
--- a/drivers/mfd/max8998.c
+++ b/drivers/mfd/max8998.c
@@ -110,8 +110,6 @@ int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
 		u8 old_val = ret & 0xff;
 		u8 new_val = (val & mask) | (old_val & (~mask));
 		ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
-		if (ret >= 0)
-			ret = 0;
 	}
 	mutex_unlock(&max8998->iolock);
 	return ret;
@@ -155,6 +153,8 @@ static int max8998_i2c_probe(struct i2c_client *i2c,
 
 err:
 	mfd_remove_devices(max8998->dev);
+	max8998_irq_exit(max8998);
+	i2c_unregister_device(max8998->rtc);
 	kfree(max8998);
 	return ret;
 }
@@ -164,6 +164,8 @@ static int max8998_i2c_remove(struct i2c_client *i2c)
 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
 
 	mfd_remove_devices(max8998->dev);
+	max8998_irq_exit(max8998);
+	i2c_unregister_device(max8998->rtc);
 	kfree(max8998);
 
 	return 0;
-- 
1.7.2