From: "Ram Gupta" <ram.gupta5@gmail.com>

Fix the issue of returning 0 even in case of error from uart_set_info
function.  Now it returns the error EBUSY when it can not set new port. 

Signed-off-by: Ram Gupta <r.gupta@astronautics.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/serial/serial_core.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN drivers/serial/serial_core.c~drivers-returning-proper-error-from-serial-driver drivers/serial/serial_core.c
--- a/drivers/serial/serial_core.c~drivers-returning-proper-error-from-serial-driver
+++ a/drivers/serial/serial_core.c
@@ -792,6 +792,7 @@ static int uart_set_info(struct uart_sta
 			 * We failed anyway.
 			 */
 			retval = -EBUSY;
+			goto exit;  // Added to return the correct error -Ram Gupta
 		}
 	}
 
_