From: Jiri Slaby <jslaby@suse.cz>
Date: Tue, 3 May 2016 15:05:55 +0000 (+0200)
Subject: tty: vt, finish looping on duplicate
X-Git-Tag: v5.15~13571^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=96317e9e2a12d01eaaebf6b1e92b0f96c121e20a;p=platform%2Fkernel%2Flinux-starfive.git

tty: vt, finish looping on duplicate

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@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 3ed1ae2..dc12532 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;