linux-kernel - [tip: locking/core] locking/debug: Fix debugfs API return value checks to use IS

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Date:   Tue, 03 Oct 2023 08:31:15 -0000
From:   "tip-bot2 for Atul Kumar Pant" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Atul Kumar Pant <atulpant.linux@...il.com>,
        Ingo Molnar <mingo@...nel.org>,
        Waiman Long <longman@...hat.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: locking/core] locking/debug: Fix debugfs API return value
 checks to use IS_ERR()

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     8788c6c2feb3600ba1a2f84ac5d258af4a284cea
Gitweb:        https://git.kernel.org/tip/8788c6c2feb3600ba1a2f84ac5d258af4a284cea
Author:        Atul Kumar Pant <atulpant.linux@...il.com>
AuthorDate:    Mon, 07 Aug 2023 17:48:34 +05:30
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 03 Oct 2023 10:11:25 +02:00

locking/debug: Fix debugfs API return value checks to use IS_ERR()

Update the checking of return values from debugfs_create_file()
and debugfs_create_dir() to use IS_ERR().

Signed-off-by: Atul Kumar Pant <atulpant.linux@...il.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Acked-by: Waiman Long <longman@...hat.com>
Link: https://lore.kernel.org/r/20230807121834.7438-1-atulpant.linux@gmail.com
---
 kernel/locking/lock_events.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/locking/lock_events.c b/kernel/locking/lock_events.c
index fa2c2f9..e68d820 100644
--- a/kernel/locking/lock_events.c
+++ b/kernel/locking/lock_events.c
@@ -146,7 +146,7 @@ static int __init init_lockevent_counts(void)
 	struct dentry *d_counts = debugfs_create_dir(LOCK_EVENTS_DIR, NULL);
 	int i;
 
-	if (!d_counts)
+	if (IS_ERR(d_counts))
 		goto out;
 
 	/*
@@ -159,14 +159,14 @@ static int __init init_lockevent_counts(void)
 	for (i = 0; i < lockevent_num; i++) {
 		if (skip_lockevent(lockevent_names[i]))
 			continue;
-		if (!debugfs_create_file(lockevent_names[i], 0400, d_counts,
-					 (void *)(long)i, &fops_lockevent))
+		if (IS_ERR(debugfs_create_file(lockevent_names[i], 0400, d_counts,
+					 (void *)(long)i, &fops_lockevent)))
 			goto fail_undo;
 	}
 
-	if (!debugfs_create_file(lockevent_names[LOCKEVENT_reset_cnts], 0200,
+	if (IS_ERR(debugfs_create_file(lockevent_names[LOCKEVENT_reset_cnts], 0200,
 				 d_counts, (void *)(long)LOCKEVENT_reset_cnts,
-				 &fops_lockevent))
+				 &fops_lockevent)))
 		goto fail_undo;
 
 	return 0;