[media] v4l: use i2c_smbus_read_word_swapped

Function ensures that error codes don't get mangled.
Dependant on:
which is working it's way through the i2c tree.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/mt9m001.c

@@ -108,14 +108,13 @@ static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
 
 static int reg_read(struct i2c_client *client, const u8 reg)
 {
-	s32 data = i2c_smbus_read_word_data(client, reg);
-	return data < 0 ? data : swab16(data);
+	return i2c_smbus_read_word_swapped(client, reg);
 }
 
 static int reg_write(struct i2c_client *client, const u8 reg,
 		     const u16 data)
 {
-	return i2c_smbus_write_word_data(client, reg, swab16(data));
+	return i2c_smbus_write_word_swapped(client, reg, data);
 }
 
 static int reg_set(struct i2c_client *client, const u8 reg,

drivers/media/video/mt9m111.c

@@ -210,7 +210,7 @@ static int reg_page_map_set(struct i2c_client *client, const u16 reg)
 	if (page > 2)
 		return -EINVAL;
 
-	ret = i2c_smbus_write_word_data(client, MT9M111_PAGE_MAP, swab16(page));
+	ret = i2c_smbus_write_word_swapped(client, MT9M111_PAGE_MAP, page);
 	if (!ret)
 		mt9m111->lastpage = page;
 	return ret;
@@ -222,7 +222,7 @@ static int mt9m111_reg_read(struct i2c_client *client, const u16 reg)
 
 	ret = reg_page_map_set(client, reg);
 	if (!ret)
-		ret = swab16(i2c_smbus_read_word_data(client, reg & 0xff));
+		ret = i2c_smbus_read_word_swapped(client, reg & 0xff);
 
 	dev_dbg(&client->dev, "read  reg.%03x -> %04x\n", reg, ret);
 	return ret;
@@ -235,8 +235,7 @@ static int mt9m111_reg_write(struct i2c_client *client, const u16 reg,
 
 	ret = reg_page_map_set(client, reg);
 	if (!ret)
-		ret = i2c_smbus_write_word_data(client, reg & 0xff,
-						swab16(data));
+		ret = i2c_smbus_write_word_swapped(client, reg & 0xff, data);
 	dev_dbg(&client->dev, "write reg.%03x = %04x -> %d\n", reg, data, ret);
 	return ret;
 }

drivers/media/video/mt9t031.c

@@ -89,14 +89,13 @@ static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
 
 static int reg_read(struct i2c_client *client, const u8 reg)
 {
-	s32 data = i2c_smbus_read_word_data(client, reg);
-	return data < 0 ? data : swab16(data);
+	return i2c_smbus_read_word_swapped(client, reg);
 }
 
 static int reg_write(struct i2c_client *client, const u8 reg,
 		     const u16 data)
 {
-	return i2c_smbus_write_word_data(client, reg, swab16(data));
+	return i2c_smbus_write_word_swapped(client, reg, data);
 }
 
 static int reg_set(struct i2c_client *client, const u8 reg,

drivers/media/video/mt9v022.c

@@ -129,14 +129,13 @@ static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
 
 static int reg_read(struct i2c_client *client, const u8 reg)
 {
-	s32 data = i2c_smbus_read_word_data(client, reg);
-	return data < 0 ? data : swab16(data);
+	return i2c_smbus_read_word_swapped(client, reg);
 }
 
 static int reg_write(struct i2c_client *client, const u8 reg,
 		     const u16 data)
 {
-	return i2c_smbus_write_word_data(client, reg, swab16(data));
+	return i2c_smbus_write_word_swapped(client, reg, data);
 }
 
 static int reg_set(struct i2c_client *client, const u8 reg,

drivers/media/video/mt9v032.c

@@ -138,10 +138,10 @@ static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd)
 
 static int mt9v032_read(struct i2c_client *client, const u8 reg)
 {
-	s32 data = i2c_smbus_read_word_data(client, reg);
+	s32 data = i2c_smbus_read_word_swapped(client, reg);
 	dev_dbg(&client->dev, "%s: read 0x%04x from 0x%02x\n", __func__,
-		swab16(data), reg);
-	return data < 0 ? data : swab16(data);
+		data, reg);
+	return data;
 }
 
 static int mt9v032_write(struct i2c_client *client, const u8 reg,
@@ -149,7 +149,7 @@ static int mt9v032_write(struct i2c_client *client, const u8 reg,
 {
 	dev_dbg(&client->dev, "%s: writing 0x%04x to 0x%02x\n", __func__,
 		data, reg);
-	return i2c_smbus_write_word_data(client, reg, swab16(data));
+	return i2c_smbus_write_word_swapped(client, reg, data);
 }
 
 static int mt9v032_set_chip_control(struct mt9v032 *mt9v032, u16 clear, u16 set)