linux-kernel - [PATCH 3/6] md: Adjust four function calls together with a variable assignment

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Date:   Tue, 2 May 2017 16:27:21 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-raid@...r.kernel.org, Neil Brown <neilb@...e.com>,
        Shaohua Li <shli@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 3/6] md: Adjust four function calls together with a variable
 assignment

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 2 May 2017 15:07:21 +0200

The script "checkpatch.pl" pointed information out like the following.

ERROR: do not use assignment in if condition

Thus fix affected source code places.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/md/md.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 65233a91e5e2..60580095a5de 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2153,7 +2153,8 @@ static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev)
 	rdev->mddev = mddev;
 	pr_debug("md: bind<%s>\n", b);
 
-	if ((err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b)))
+	err = kobject_add(&rdev->kobj, &mddev->kobj, "dev-%s", b);
+	if (err)
 		goto fail;
 
 	ko = &part_to_dev(rdev->bdev->bd_part)->kobj;
@@ -7306,7 +7307,8 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 	}
 	BUG_ON(mddev != bdev->bd_disk->private_data);
 
-	if ((err = mutex_lock_interruptible(&mddev->open_mutex)))
+	err = mutex_lock_interruptible(&mddev->open_mutex);
+	if (err)
 		goto out;
 
 	if (test_bit(MD_CLOSING, &mddev->flags)) {
@@ -8927,10 +8929,12 @@ static int __init md_init(void)
 	if (!md_misc_wq)
 		goto err_misc_wq;
 
-	if ((ret = register_blkdev(MD_MAJOR, "md")) < 0)
+	ret = register_blkdev(MD_MAJOR, "md");
+	if (ret < 0)
 		goto err_md;
 
-	if ((ret = register_blkdev(0, "mdp")) < 0)
+	ret = register_blkdev(0, "mdp");
+	if (ret < 0)
 		goto err_mdp;
 	mdp_major = ret;
 
-- 
2.12.2