linux-kernel - [PATCH v2] wifi: mt7601u: delete dead code checking debugfs returns

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Message-Id: <20230421092200.24456-1-wangjikai@hust.edu.cn>
Date:   Fri, 21 Apr 2023 09:22:00 +0000
From:   Wang Jikai <wangjikai@...t.edu.cn>
To:     Jakub Kicinski <kuba@...nel.org>, Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     hust-os-kernel-patches@...glegroups.com,
        Wang Jikai <wangjikai@...t.edu.cn>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH v2] wifi: mt7601u: delete dead code checking debugfs returns

Smatch reports that:
drivers/net/wireless/mediatek/mt7601u/debugfs.c:130
mt7601u_init_debugfs() warn: 'dir' is an error pointer or valid".

Debugfs code is not supposed to need error checking so instead of
changing this to if (IS_ERR()) the correct thing is to just delete
the dead code.

Signed-off-by: Wang Jikai <wangjikai@...t.edu.cn>
---
v1 -> v2: not add redundant removal of debugfs dir. remove fixes
tag.

The issue is found by static analysis and remains untested.
---
 drivers/net/wireless/mediatek/mt7601u/debugfs.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt7601u/debugfs.c b/drivers/net/wireless/mediatek/mt7601u/debugfs.c
index 230b0e1061a7..dbddf256921b 100644
--- a/drivers/net/wireless/mediatek/mt7601u/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt7601u/debugfs.c
@@ -127,8 +127,6 @@ void mt7601u_init_debugfs(struct mt7601u_dev *dev)
 	struct dentry *dir;
 
 	dir = debugfs_create_dir("mt7601u", dev->hw->wiphy->debugfsdir);
-	if (!dir)
-		return;
 
 	debugfs_create_u8("temperature", 0400, dir, &dev->raw_temp);
 	debugfs_create_u32("temp_mode", 0400, dir, &dev->temp_mode);
-- 
2.34.1