linux-kernel - [PATCH net v1] net:wireless:Fix an NULL vs IS_ERR() bug for debugfs_create

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Date:   Thu, 13 Jul 2023 11:03:44 +0800
From:   Wang Ming <machel@...o.com>
To:     Toke Høiland-Jørgensen <toke@...e.dk>,
        Kalle Valo <kvalo@...nel.org>,
        Rajkumar Manoharan <rmanoharan@...eros.com>,
        "John W. Linville" <linville@...driver.com>,
        Sujith Manoharan <Sujith.Manoharan@...eros.com>,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH net v1] net:wireless:Fix an NULL vs IS_ERR() bug for debugfs_create_dir()

The debugfs_create_dir() function returns error pointers,
it never returns NULL. Most incorrect error checks were fixed,
but the one in ath9k_htc_init_debug() was forgotten.

Fix the remaining error check.

Signed-off-by: Wang Ming <machel@...o.com>

Fixes: e5facc75fa91 ("ath9k_htc: Cleanup HTC debugfs")
---
 drivers/net/wireless/ath/ath9k/htc_drv_debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
index b3ed65e5c4da..c55aab01fff5 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_debug.c
@@ -491,7 +491,7 @@ int ath9k_htc_init_debug(struct ath_hw *ah)
 
 	priv->debug.debugfs_phy = debugfs_create_dir(KBUILD_MODNAME,
 					     priv->hw->wiphy->debugfsdir);
-	if (!priv->debug.debugfs_phy)
+	if (IS_ERR(priv->debug.debugfs_phy))
 		return -ENOMEM;
 
 	ath9k_cmn_spectral_init_debug(&priv->spec_priv, priv->debug.debugfs_phy);
-- 
2.25.1