From: Ryder Lee <ryder.lee@mediatek.com>
Date: Sat, 3 Dec 2022 11:22:22 +0800
Subject: [PATCH] wifi: mt76: mt7915: fix mt7915_rate_txpower_get() resource
 leaks
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 8b25301af01566f4b5a301fc1ad7c5d2b1788d7f

[ Upstream commit 8b25301af01566f4b5a301fc1ad7c5d2b1788d7f ]

Coverity message: variable "buf" going out of scope leaks the storage.

Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1527799 ("Resource leaks")
Fixes: e3296759f347 ("wifi: mt76: mt7915: enable per bandwidth power limit support")
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index fb46c2c1..a7fdcd1f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -996,7 +996,7 @@ mt7915_rate_txpower_get(struct file *file, char __user *user_buf,
 
 	ret = mt7915_mcu_get_txpower_sku(phy, txpwr, sizeof(txpwr));
 	if (ret)
-		return ret;
+		goto out;
 
 	/* Txpower propagation path: TMAC -> TXV -> BBP */
 	len += scnprintf(buf + len, sz - len,
@@ -1047,6 +1047,8 @@ mt7915_rate_txpower_get(struct file *file, char __user *user_buf,
 			 mt76_get_field(dev, reg, MT_WF_PHY_TPC_POWER));
 
 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+
+out:
 	kfree(buf);
 	return ret;
 }
-- 
2.35.3