media: saa7146: fix error return from master_xfer

Returning -1 (-EPERM) is not appropriate here, go with -EIO.
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/common/saa7146/saa7146_i2c.c

@@ -308,7 +308,7 @@ static int saa7146_i2c_transfer(struct saa7146_dev *dev, const struct i2c_msg *m
 	/* prepare the message(s), get number of u32s to transfer */
 	count = saa7146_i2c_msg_prepare(msgs, num, buffer);
 	if ( 0 > count ) {
-		err = -1;
+		err = -EIO;
 		goto out;
 	}
 
@@ -360,7 +360,7 @@ static int saa7146_i2c_transfer(struct saa7146_dev *dev, const struct i2c_msg *m
 	/* if any things had to be read, get the results */
 	if ( 0 != saa7146_i2c_msg_cleanup(msgs, num, buffer)) {
 		DEB_I2C("could not cleanup i2c-message\n");
-		err = -1;
+		err = -EIO;
 		goto out;
 	}