linux-kernel - [PATCH 13/54] md/raid1: Return directly after a failed kzalloc() in setup

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Message-ID: <7bc6f8e0-5e74-08fc-74f3-33284786ea1e@users.sourceforge.net>
Date:   Thu, 6 Oct 2016 11:09:18 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-raid@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Guoqing Jiang <gqjiang@...e.com>, Jens Axboe <axboe@...com>,
        Mike Christie <mchristi@...hat.com>,
        Neil Brown <neilb@...e.com>, Shaohua Li <shli@...nel.org>,
        Tomasz Majchrzak <tomasz.majchrzak@...el.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 13/54] md/raid1: Return directly after a failed kzalloc() in
 setup_conf()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 4 Oct 2016 15:56:41 +0200

* Return directly after a call of the function "kzalloc" failed
  at the beginning.

* Delete a repeated check for the local variable "conf"
  which became unnecessary with this refactoring.

* Reorder two calls for the function "kfree" at the end.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/md/raid1.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 5969711..74346f5 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2779,7 +2779,7 @@ static struct r1conf *setup_conf(struct mddev *mddev)
 
 	conf = kzalloc(sizeof(struct r1conf), GFP_KERNEL);
 	if (!conf)
-		goto abort;
+		return ERR_PTR(-ENOMEM);
 
 	conf->mirrors = kcalloc(mddev->raid_disks * 2,
 				sizeof(*conf->mirrors),
@@ -2880,13 +2880,11 @@ static struct r1conf *setup_conf(struct mddev *mddev)
 	return conf;
 
  abort:
-	if (conf) {
-		mempool_destroy(conf->r1bio_pool);
-		kfree(conf->mirrors);
-		safe_put_page(conf->tmppage);
-		kfree(conf->poolinfo);
-		kfree(conf);
-	}
+	mempool_destroy(conf->r1bio_pool);
+	kfree(conf->poolinfo);
+	safe_put_page(conf->tmppage);
+	kfree(conf->mirrors);
+	kfree(conf);
 	return ERR_PTR(err);
 }
 
-- 
2.10.1