[PATCH 2/2] tty: vt, finish looping on duplicate

From: Jiri Slaby
Date: Tue May 03 2016 - 11:06:21 EST


When the console is already registered, stop crawling the
registered_con_driver array and return an error immediatelly.

This makes the code more obvious. And we do not need to initialize
retval anymore.

Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/tty/vt/vt.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 3ed1ae211acc..dc125322f48f 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3575,7 +3575,7 @@ static int do_register_con_driver(const struct consw *csw, int first, int last)
struct module *owner = csw->owner;
struct con_driver *con_driver;
const char *desc;
- int i, retval = 0;
+ int i, retval;

WARN_CONSOLE_UNLOCKED();

@@ -3586,13 +3586,12 @@ static int do_register_con_driver(const struct consw *csw, int first, int last)
con_driver = &registered_con_driver[i];

/* already registered */
- if (con_driver->con == csw)
+ if (con_driver->con == csw) {
retval = -EBUSY;
+ goto err;
+ }
}

- if (retval)
- goto err;
-
desc = csw->con_startup();
if (!desc) {
retval = -ENODEV;
--
2.8.2