From: Sergey Organov <sorganov@gmail.com>
Date: Tue, 23 Apr 2019 05:06:58 +0000 (+0300)
Subject: tty: serial_core: fix error code returned by uart_register_driver()
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=050dfc09f8a43ae41f966d87f81ef35dfad754d5;p=openwrt%2Fstaging%2Fblogic.git

tty: serial_core: fix error code returned by uart_register_driver()

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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 0decb0bf991d..83f4dd0bfd74 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2507,7 +2507,7 @@ 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);
 
@@ -2559,7 +2559,7 @@ int uart_register_driver(struct uart_driver *drv)
 out_kfree:
 	kfree(drv->state);
 out:
-	return -ENOMEM;
+	return retval;
 }
 
 /**