linux-kernel - [PATCH 27/54] md/raid5: Return directly after a failed kzalloc() in setup

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Date:   Thu, 6 Oct 2016 11:26:04 +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 27/54] md/raid5: Return directly after a failed kzalloc() in
 setup_conf()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 4 Oct 2016 22:44:59 +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.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/md/raid5.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 562138f..17f50a6 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -6482,8 +6482,8 @@ static struct r5conf *setup_conf(struct mddev *mddev)
 	}
 
 	conf = kzalloc(sizeof(*conf), GFP_KERNEL);
-	if (conf == NULL)
-		goto abort;
+	if (!conf)
+		return ERR_PTR(-ENOMEM);
 	/* Don't enable multi-threading by default*/
 	if (!alloc_thread_groups(conf, 0, &group_cnt, &worker_cnt_per_group,
 				 &new_group)) {
@@ -6646,11 +6646,8 @@ static struct r5conf *setup_conf(struct mddev *mddev)
 	return conf;
 
  abort:
-	if (conf) {
-		free_conf(conf);
-		return ERR_PTR(-EIO);
-	} else
-		return ERR_PTR(-ENOMEM);
+	free_conf(conf);
+	return ERR_PTR(-EIO);
 }
 
 static int only_parity(int raid_disk, int algo, int raid_disks, int max_degraded)
-- 
2.10.1