[PATCH] scsi: qla2xxx: Fix the NULL vs IS_ERR() bug for debugfs_create_dir()

From: Jinjie Ruan <ruanjinjie@huawei.com>
To: <linux-scsi@vger.kernel.org>, Nilesh Javali <njavali@marvell.com>,
	<GR-QLogic-Storage-Upstream@marvell.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Himanshu Madhani <himanshu.madhani@oracle.com>,
	Saurav Kashyap <skashyap@marvell.com>,
	Arun Easi <aeasi@marvell.com>
Cc: <ruanjinjie@huawei.com>
Subject: [PATCH] scsi: qla2xxx: Fix the NULL vs IS_ERR() bug for debugfs_create_dir()
Date: Thu, 31 Aug 2023 22:09:29 +0800	[thread overview]
Message-ID: <20230831140930.3166359-1-ruanjinjie@huawei.com> (raw)

Since both debugfs_create_dir() and debugfs_create_file() return
ERR_PTR and never return NULL, So use IS_ERR() to check it
instead of checking NULL.

Fixes: 1e98fb0f9208 ("scsi: qla2xxx: Setup debugfs entries for remote ports")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
---
 drivers/scsi/qla2xxx/qla_dfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_dfs.c b/drivers/scsi/qla2xxx/qla_dfs.c
index f060e593685d..a7a364760b80 100644
--- a/drivers/scsi/qla2xxx/qla_dfs.c
+++ b/drivers/scsi/qla2xxx/qla_dfs.c
@@ -116,7 +116,7 @@ qla2x00_dfs_create_rport(scsi_qla_host_t *vha, struct fc_port *fp)
 
 	sprintf(wwn, "pn-%016llx", wwn_to_u64(fp->port_name));
 	fp->dfs_rport_dir = debugfs_create_dir(wwn, vha->dfs_rport_root);
-	if (!fp->dfs_rport_dir)
+	if (IS_ERR(fp->dfs_rport_dir))
 		return;
 	if (NVME_TARGET(vha->hw, fp))
 		debugfs_create_file("dev_loss_tmo", 0600, fp->dfs_rport_dir,
@@ -708,14 +708,14 @@ qla2x00_dfs_setup(scsi_qla_host_t *vha)
 	if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha)) {
 		ha->tgt.dfs_naqp = debugfs_create_file("naqp",
 		    0400, ha->dfs_dir, vha, &dfs_naqp_ops);
-		if (!ha->tgt.dfs_naqp) {
+		if (IS_ERR(ha->tgt.dfs_naqp)) {
 			ql_log(ql_log_warn, vha, 0xd011,
 			       "Unable to create debugFS naqp node.\n");
 			goto out;
 		}
 	}
 	vha->dfs_rport_root = debugfs_create_dir("rports", ha->dfs_dir);
-	if (!vha->dfs_rport_root) {
+	if (IS_ERR(vha->dfs_rport_root)) {
 		ql_log(ql_log_warn, vha, 0xd012,
 		       "Unable to create debugFS rports node.\n");
 		goto out;
-- 
2.34.1

