linux-kernel - [PATCH v3] block: aoe: no need to check return value of debugfs

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Message-ID: <20190603194754.GB21877@kroah.com>
Date:   Mon, 3 Jun 2019 21:47:54 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Justin Sanders <justin@...aid.com>, linux-kernel@...r.kernel.org
Cc:     "Ed L. Cashin" <ed.cashin@....org>, Jens Axboe <axboe@...nel.dk>,
        linux-block@...r.kernel.org
Subject: [PATCH v3] block: aoe: no need to check return value of
 debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: "Ed L. Cashin" <ed.cashin@....org>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: linux-block@...r.kernel.org
Cc: Omar Sandoval <osandov@...ndov.com>
Cc: Justin Sanders <justin@...aid.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
v3: Justin is now the maintainer of this driver, properly send it to
    him.
v2: fix uninitialized entry issue found by Omar Sandoval

 drivers/block/aoe/aoeblk.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index e2c6aae2d636..bd19f8af950b 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -196,7 +196,6 @@ static const struct file_operations aoe_debugfs_fops = {
 static void
 aoedisk_add_debugfs(struct aoedev *d)
 {
-	struct dentry *entry;
 	char *p;
 
 	if (aoe_debugfs_dir == NULL)
@@ -207,15 +206,8 @@ aoedisk_add_debugfs(struct aoedev *d)
 	else
 		p++;
 	BUG_ON(*p == '\0');
-	entry = debugfs_create_file(p, 0444, aoe_debugfs_dir, d,
-				    &aoe_debugfs_fops);
-	if (IS_ERR_OR_NULL(entry)) {
-		pr_info("aoe: cannot create debugfs file for %s\n",
-			d->gd->disk_name);
-		return;
-	}
-	BUG_ON(d->debugfs);
-	d->debugfs = entry;
+	d->debugfs = debugfs_create_file(p, 0444, aoe_debugfs_dir, d,
+					 &aoe_debugfs_fops);
 }
 void
 aoedisk_rm_debugfs(struct aoedev *d)
@@ -472,10 +464,6 @@ aoeblk_init(void)
 	if (buf_pool_cache == NULL)
 		return -ENOMEM;
 	aoe_debugfs_dir = debugfs_create_dir("aoe", NULL);
-	if (IS_ERR_OR_NULL(aoe_debugfs_dir)) {
-		pr_info("aoe: cannot create debugfs directory\n");
-		aoe_debugfs_dir = NULL;
-	}
 	return 0;
 }
 
-- 
2.21.0