[PATCH] wifi: mt76: mt7915: fix memory leak in mt7915_rate_txpower_get

[Lorenzo Bianconi <lorenzo@kernel.org>]

Fix possible memory leak in mt7915_rate_txpower_get routine if
mt7915_mcu_get_txpower_sku() fails.

Fixes: e3296759f347 ("wifi: mt76: mt7915: enable per bandwidth power limit support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index fb46c2c1784f..4730508652af 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -990,14 +990,14 @@ mt7915_rate_txpower_get(struct file *file, char __user *user_buf,
 	char *buf;
 	u32 reg;
 
-	buf = kzalloc(sz, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
 	ret = mt7915_mcu_get_txpower_sku(phy, txpwr, sizeof(txpwr));
 	if (ret)
 		return ret;
 
+	buf = kzalloc(sz, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
 	/* Txpower propagation path: TMAC -> TXV -> BBP */
 	len += scnprintf(buf + len, sz - len,
 			 "\nPhy%d Tx power table (channel %d)\n",
-- 
2.39.0