[PATCH] I2C: refactor message in i2c_detach_client

We could refactor the error message 34 different i2c drivers print if
i2c_detach_client() fails in this function itself. Saves quite a few
lines of code. Documentation is updated to reflect that change.

Note that this patch should be applied after Rudolf Marek's w83792d
patches.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/hwmon/lm90.c

diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 4b914ec..fbf9dac 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -562,11 +562,8 @@
 
 	hwmon_device_unregister(data->class_dev);
 
-	if ((err = i2c_detach_client(client))) {
-		dev_err(&client->dev, "Client deregistration failed, "
-			"client not detached.\n");
+	if ((err = i2c_detach_client(client)))
 		return err;
-	}
 
 	kfree(data);
 	return 0;