drivers/leds/leds-tca6507.c: cleanup error handling in tca6507_probe()

Just a small tidy-up.

1) There is a NULL dereference if the tca allocation fails.
2) The call to cancel_work_sync() isn't needed because we haven't
   scheduled any work.
3) The call to i2c_set_clientdata() isn't needed because the core
   handles that automatically if probe() fails.
4) I added some curly braces for style reasons.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/leds/leds-tca6507.c

@@ -687,10 +687,9 @@ static int __devinit tca6507_probe(struct i2c_client *client,
 			NUM_LEDS);
 		return -ENODEV;
 	}
-	err = -ENOMEM;
 	tca = kzalloc(sizeof(*tca), GFP_KERNEL);
 	if (!tca)
-		goto exit;
+		return -ENOMEM;
 
 	tca->client = client;
 	INIT_WORK(&tca->work, tca6507_work);
@@ -724,11 +723,10 @@ static int __devinit tca6507_probe(struct i2c_client *client,
 
 	return 0;
 exit:
-	while (i--)
+	while (i--) {
 		if (tca->leds[i].led_cdev.name)
 			led_classdev_unregister(&tca->leds[i].led_cdev);
-	cancel_work_sync(&tca->work);
-	i2c_set_clientdata(client, NULL);
+	}
 	kfree(tca);
 	return err;
 }