linux-kernel - [PATCH 6/7] crypto: ccp: no need to check return value of debugfs

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Message-Id: <20190122151422.14204-7-gregkh@linuxfoundation.org>
Date:   Tue, 22 Jan 2019 16:14:21 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        David Miller <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Gary Hook <gary.hook@....com>
Subject: [PATCH 6/7] crypto: ccp: 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: Tom Lendacky <thomas.lendacky@....com>
Cc: Gary Hook <gary.hook@....com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: linux-crypto@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/crypto/ccp/ccp-debugfs.c | 36 +++++++-------------------------
 1 file changed, 7 insertions(+), 29 deletions(-)

diff --git a/drivers/crypto/ccp/ccp-debugfs.c b/drivers/crypto/ccp/ccp-debugfs.c
index 1a734bd2070a..4bd26af7098d 100644
--- a/drivers/crypto/ccp/ccp-debugfs.c
+++ b/drivers/crypto/ccp/ccp-debugfs.c
@@ -286,10 +286,7 @@ void ccp5_debugfs_setup(struct ccp_device *ccp)
 {
 	struct ccp_cmd_queue *cmd_q;
 	char name[MAX_NAME_LEN + 1];
-	struct dentry *debugfs_info;
-	struct dentry *debugfs_stats;
 	struct dentry *debugfs_q_instance;
-	struct dentry *debugfs_q_stats;
 	int i;
 
 	if (!debugfs_initialized())
@@ -299,24 +296,14 @@ void ccp5_debugfs_setup(struct ccp_device *ccp)
 	if (!ccp_debugfs_dir)
 		ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 	mutex_unlock(&ccp_debugfs_lock);
-	if (!ccp_debugfs_dir)
-		return;
 
 	ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir);
-	if (!ccp->debugfs_instance)
-		goto err;
 
-	debugfs_info = debugfs_create_file("info", 0400,
-					   ccp->debugfs_instance, ccp,
-					   &ccp_debugfs_info_ops);
-	if (!debugfs_info)
-		goto err;
+	debugfs_create_file("info", 0400, ccp->debugfs_instance, ccp,
+			    &ccp_debugfs_info_ops);
 
-	debugfs_stats = debugfs_create_file("stats", 0600,
-					    ccp->debugfs_instance, ccp,
-					    &ccp_debugfs_stats_ops);
-	if (!debugfs_stats)
-		goto err;
+	debugfs_create_file("stats", 0600, ccp->debugfs_instance, ccp,
+			    &ccp_debugfs_stats_ops);
 
 	for (i = 0; i < ccp->cmd_q_count; i++) {
 		cmd_q = &ccp->cmd_q[i];
@@ -325,21 +312,12 @@ void ccp5_debugfs_setup(struct ccp_device *ccp)
 
 		debugfs_q_instance =
 			debugfs_create_dir(name, ccp->debugfs_instance);
-		if (!debugfs_q_instance)
-			goto err;
-
-		debugfs_q_stats =
-			debugfs_create_file("stats", 0600,
-					    debugfs_q_instance, cmd_q,
-					    &ccp_debugfs_queue_ops);
-		if (!debugfs_q_stats)
-			goto err;
+
+		debugfs_create_file("stats", 0600, debugfs_q_instance, cmd_q,
+				    &ccp_debugfs_queue_ops);
 	}
 
 	return;
-
-err:
-	debugfs_remove_recursive(ccp->debugfs_instance);
 }
 
 void ccp5_debugfs_destroy(void)
-- 
2.20.1