linux-kernel - [PATCH] ntb: hw: amd: Fix debugfs_create

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Message-ID: <ZF6ggnry8BVjQyYE@yoga>
Date:   Sat, 13 May 2023 01:54:34 +0530
From:   Anup Sharma <anupnewsmail@...il.com>
To:     Sanjay R Mehta <sanju.mehta@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Jon Mason <jdmason@...zu.us>,
        Dave Jiang <dave.jiang@...el.com>,
        Allen Hubbe <allenbh@...il.com>, ntb@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ntb: hw: amd: Fix debugfs_create_dir error checking

The debugfs_create_dir function returns ERR_PTR in case of error, and the
only correct way to check if an error occurred is 'IS_ERR' inline function.
This patch will replace the null-comparison with IS_ERR.

Signed-off-by: Anup Sharma <anupnewsmail@...il.com>
Suggested-by: Ivan Orlov <ivan.orlov0322@...il.com>
---
 drivers/ntb/hw/amd/ntb_hw_amd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
index 04550b1f984c..05bdee1c78e6 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.c
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.c
@@ -941,7 +941,7 @@ static void ndev_init_debugfs(struct amd_ntb_dev *ndev)
 		ndev->debugfs_dir =
 			debugfs_create_dir(pci_name(ndev->ntb.pdev),
 					   debugfs_dir);
-		if (!ndev->debugfs_dir)
+		if (IS_ERR(ndev->debugfs_dir))
 			ndev->debugfs_info = NULL;
 		else
 			ndev->debugfs_info =
-- 
2.34.1