[PATCH] tty: serial_core: fix error code returned by uart_register_driver()

[Sergey Organov <sorganov@xxxxxxxxx>]

uart_register_driver() returned -ENOMEM on any error, even when
tty_register_driver() call returned another one, such as -EBUSY.

Signed-off-by: Sergey Organov <sorganov@xxxxxxxxx>
---
 drivers/tty/serial/serial_core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 351843f..2ce8157 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2505,7 +2505,7 @@ static const struct tty_port_operations uart_port_ops = {
 int uart_register_driver(struct uart_driver *drv)
 {
 	struct tty_driver *normal;
-	int i, retval;
+	int i, retval = -ENOMEM;
 
 	BUG_ON(drv->state);
 
@@ -2557,7 +2557,7 @@ int uart_register_driver(struct uart_driver *drv)
 out_kfree:
 	kfree(drv->state);
 out:
-	return -ENOMEM;
+	return retval;
 }
 
 /**
-- 
2.10.0.1.g57b01a3