gpiolib: fix request related issue

Fix request-already-requested handling in gpio_request().
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Cc: <stable@kernel.org>		[2.6.28.x]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/gpio/gpiolib.c

@@ -789,6 +789,7 @@ int gpio_request(unsigned gpio, const char *label)
 	} else {
 		status = -EBUSY;
 		module_put(chip->owner);
+		goto done;
 	}
 
 	if (chip->request) {