linux-kernel - [PATCH] wifi: rtw89: debug: fix error code in rtw89_debug_priv_btc_manual

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Message-ID: <tencent_D22D1FB0000F210538D44A09AA9BB6DAB407@qq.com>
Date:   Sun,  9 Jul 2023 17:59:06 +0800
From:   Zhang Shurong <zhang_shurong@...mail.com>
To:     pkshih@...ltek.com
Cc:     kvalo@...nel.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Zhang Shurong <zhang_shurong@...mail.com>
Subject: [PATCH] wifi: rtw89: debug: fix error code in rtw89_debug_priv_btc_manual_set

If there is a failure during kstrtobool_from_user()
rtw89_debug_priv_btc_manual_set should return negative error code
instead of a positive value count. Fix this bug by returning
correct error code.

Fixes: e3ec7017f6a2 ("rtw89: add Realtek 802.11ax driver")

Signed-off-by: Zhang Shurong <zhang_shurong@...mail.com>
---
 drivers/net/wireless/realtek/rtw89/debug.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw89/debug.c b/drivers/net/wireless/realtek/rtw89/debug.c
index 1db2d59d33ff..35fe6b4ad9b3 100644
--- a/drivers/net/wireless/realtek/rtw89/debug.c
+++ b/drivers/net/wireless/realtek/rtw89/debug.c
@@ -3192,9 +3192,13 @@ static ssize_t rtw89_debug_priv_btc_manual_set(struct file *filp,
 	struct rtw89_dev *rtwdev = debugfs_priv->rtwdev;
 	struct rtw89_btc *btc = &rtwdev->btc;
 	bool btc_manual;
+	int ret;
 
-	if (kstrtobool_from_user(user_buf, count, &btc_manual))
+	ret = kstrtobool_from_user(user_buf, count, &btc_manual);
+	if (ret) {
+		count = ret;
 		goto out;
+	}
 
 	btc->ctrl.manual = btc_manual;
 out:
-- 
2.30.2