linux-kernel - [PATCH 2/3] kdbus: optimize error path in kdbus_reply

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Message-Id: <1434561298-4576-3-git-send-email-sergei@s15v.net>
Date:	Wed, 17 Jun 2015 20:14:57 +0300
From:	Sergei Zviagintsev <sergei@...v.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Daniel Mack <daniel@...que.org>,
	David Herrmann <dh.herrmann@...glemail.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Cc:	linux-kernel@...r.kernel.org, Sergei Zviagintsev <sergei@...v.net>
Subject: [PATCH 2/3] kdbus: optimize error path in kdbus_reply_new()

Move cleanup code to separate location as it never executes on normal
flow. This removes extra if-block and the need to initialize `ret'.

Signed-off-by: Sergei Zviagintsev <sergei@...v.net>
---
 ipc/kdbus/reply.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/ipc/kdbus/reply.c b/ipc/kdbus/reply.c
index 9d823ebee71f..e6791d86ec92 100644
--- a/ipc/kdbus/reply.c
+++ b/ipc/kdbus/reply.c
@@ -37,7 +37,7 @@ struct kdbus_reply *kdbus_reply_new(struct kdbus_conn *reply_src,
 				    bool sync)
 {
 	struct kdbus_reply *r;
-	int ret = 0;
+	int ret;
 
 	if (atomic_inc_return(&reply_dst->request_count) >
 	    KDBUS_CONN_MAX_REQUESTS_PENDING) {
@@ -64,13 +64,11 @@ struct kdbus_reply *kdbus_reply_new(struct kdbus_conn *reply_src,
 		r->waiting = true;
 	}
 
-exit_dec_request_count:
-	if (ret < 0) {
-		atomic_dec(&reply_dst->request_count);
-		return ERR_PTR(ret);
-	}
-
 	return r;
+
+exit_dec_request_count:
+	atomic_dec(&reply_dst->request_count);
+	return ERR_PTR(ret);
 }
 
 static void __kdbus_reply_free(struct kref *kref)
-- 
1.8.3.1

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