linux-kernel - [PATCH] powerpc: fix debugfs_create

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Date:   Sat, 13 May 2023 20:41:53 +0530
From:   mirimmad@...look.com
To:     unlisted-recipients:; (no To-header on input)
Cc:     skhan@...uxfoundation.org, Immad Mir <mirimmad17@...il.com>,
        Ivan Orlov <ivan.orlov0322@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc: fix debugfs_create_dir error checking

From: Immad Mir <mirimmad17@...il.com>

The debugfs_create_dir returns ERR_PTR incase of an error and the
correct way of checking it by using the IS_ERR inline function, and
not the simple null comparision. This patch fixes this.

Suggested-By: Ivan Orlov <ivan.orlov0322@...il.com>
Signed-off-by: Immad Mir <mirimmad17@...il.com>
---
 arch/powerpc/platforms/powernv/opal-xscom.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/opal-xscom.c b/arch/powerpc/platforms/powernv/opal-xscom.c
index 6b4eed2ef..262cd6fac 100644
--- a/arch/powerpc/platforms/powernv/opal-xscom.c
+++ b/arch/powerpc/platforms/powernv/opal-xscom.c
@@ -168,7 +168,7 @@ static int scom_debug_init_one(struct dentry *root, struct device_node *dn,
 	ent->path.size = strlen((char *)ent->path.data);

 	dir = debugfs_create_dir(ent->name, root);
-	if (!dir) {
+	if (IS_ERR(dir)) {
 		kfree(ent->path.data);
 		kfree(ent);
 		return -1;
@@ -190,7 +190,7 @@ static int scom_debug_init(void)
 		return 0;

 	root = debugfs_create_dir("scom", arch_debugfs_dir);
-	if (!root)
+	if (IS_ERR(root))
 		return -1;

 	rc = 0;
--
2.40.0