linux-kernel - [PATCH] ath6kl: Fix debugfs_create

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Date:   Sun, 30 Jul 2023 19:45:42 -0700
From:   Atul Raut <rauji.raut@...il.com>
To:     kvalo@...nel.org
Cc:     linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH] ath6kl: Fix debugfs_create_dir error checking

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

This issue was found with the help of Coccinelle.
./drivers/net/wireless/ath/ath6kl/debug.c:1796:6-21: Wrong debugfs call error processing on line 1796

Signed-off-by: Atul Raut <rauji.raut@...il.com>
---
 drivers/net/wireless/ath/ath6kl/debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c
index 433a047f3747..505af195e299 100644
--- a/drivers/net/wireless/ath/ath6kl/debug.c
+++ b/drivers/net/wireless/ath/ath6kl/debug.c
@@ -1793,7 +1793,7 @@ int ath6kl_debug_init_fs(struct ath6kl *ar)
 {
 	ar->debugfs_phy = debugfs_create_dir("ath6kl",
 					     ar->wiphy->debugfsdir);
-	if (!ar->debugfs_phy)
+	if (IS_ERR(ar->debugfs_phy))
 		return -ENOMEM;
 
 	debugfs_create_file("tgt_stats", 0400, ar->debugfs_phy, ar,
-- 
2.34.1