linux-kernel - [PATCH v1] drivers:megaraid:Fix the NULL vs IS_ERR() bug for debugfs_create

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Message-Id: <20240821072444.8838-1-11162571@vivo.com>
Date: Wed, 21 Aug 2024 03:24:43 -0400
From: Yang Ruibin <11162571@...o.com>
To: Kashyap Desai <kashyap.desai@...adcom.com>,
	Sumit Saxena <sumit.saxena@...adcom.com>,
	Shivasharan S <shivasharan.srikanteshwara@...adcom.com>,
	Chandrakanth patil <chandrakanth.patil@...adcom.com>,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	megaraidlinux.pdl@...adcom.com,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: opensource.kernel@...o.com,
	Yang Ruibin <11162571@...o.com>
Subject: [PATCH v1] drivers:megaraid:Fix the NULL vs IS_ERR() bug for debugfs_create_dir()

The debugfs_create_dir() function returns error pointers.
It never returns NULL. So use IS_ERR() to check it.

Signed-off-by: Yang Ruibin <11162571@...o.com>
---
 drivers/scsi/megaraid/megaraid_sas_debugfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_debugfs.c b/drivers/scsi/megaraid/megaraid_sas_debugfs.c
index c69760775efa..b8b66d590571 100644
--- a/drivers/scsi/megaraid/megaraid_sas_debugfs.c
+++ b/drivers/scsi/megaraid/megaraid_sas_debugfs.c
@@ -102,7 +102,7 @@ static const struct file_operations megasas_debugfs_raidmap_fops = {
 void megasas_init_debugfs(void)
 {
 	megasas_debugfs_root = debugfs_create_dir("megaraid_sas", NULL);
-	if (!megasas_debugfs_root)
+	if (IS_ERR(megasas_debugfs_root))
 		pr_info("Cannot create debugfs root\n");
 }
 
@@ -132,7 +132,7 @@ megasas_setup_debugfs(struct megasas_instance *instance)
 		if (!instance->debugfs_root) {
 			instance->debugfs_root =
 				debugfs_create_dir(name, megasas_debugfs_root);
-			if (!instance->debugfs_root) {
+			if (IS_ERR(instance->debugfs_root)) {
 				dev_err(&instance->pdev->dev,
 					"Cannot create per adapter debugfs directory\n");
 				return;
-- 
2.34.1