linux-kernel - [patch] block-dev: checking for NULL instead of IS

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Date:	Tue, 8 Mar 2016 15:05:46 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>, Shaohua Li <shli@...com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] block-dev: checking for NULL instead of IS_ERR()

This should be an IS_ERR() check.  mount_pseudo() returns error pointers
and this function should return the error pointer to its caller as well.

Fixes: 3684aa7099e0 ('block-dev: enable writeback cgroup support')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 3172c4e..2de969e 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -577,7 +577,7 @@ static struct dentry *bd_mount(struct file_system_type *fs_type,
 {
 	struct dentry *dent;
 	dent = mount_pseudo(fs_type, "bdev:", &bdev_sops, NULL, BDEVFS_MAGIC);
-	if (dent)
+	if (!IS_ERR(dent))
 		dent->d_sb->s_iflags |= SB_I_CGROUPWB;
 	return dent;
 }