linux-kernel - [PATCH AUTOSEL 6.13 02/35] wifi: ath12k: ath12k_mac_op_set

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Message-Id: <20250126150029.953021-2-sashal@kernel.org>
Date: Sun, 26 Jan 2025 09:59:56 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Kalle Valo <quic_kvalo@...cinc.com>,
	kernel test robot <lkp@...el.com>,
	Dan Carpenter <dan.carpenter@...aro.org>,
	Sasha Levin <sashal@...nel.org>,
	kvalo@...nel.org,
	jjohnson@...nel.org,
	linux-wireless@...r.kernel.org,
	ath12k@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.13 02/35] wifi: ath12k: ath12k_mac_op_set_key(): fix uninitialized symbol 'ret'

From: Kalle Valo <quic_kvalo@...cinc.com>

[ Upstream commit ad969bc9ee73fa9eda6223be2a7c0c6caf937d71 ]

Dan reported that in some cases the ret variable could be uninitialized. Fix
that by removing the out label entirely and returning zero explicitly on
succesful cases.

Also remove the unnecessary else branches to follow more the style used in
ath12k and now it's easier to see the error handling.

No functional changes.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
Closes: https://lore.kernel.org/all/7e7afd00-ad84-4744-8d94-416bab7e7dd9@stanley.mountain/
Signed-off-by: Kalle Valo <quic_kvalo@...cinc.com>
Link: https://patch.msgid.link/20241126171139.2350704-10-kvalo@kernel.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/ath/ath12k/mac.c | 57 +++++++++++++++------------
 1 file changed, 32 insertions(+), 25 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index d493ec812055f..b1f0a5e9d6577 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -4372,6 +4372,7 @@ static int ath12k_mac_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 
 	if (sta) {
 		ahsta = ath12k_sta_to_ahsta(sta);
+
 		/* For an ML STA Pairwise key is same for all associated link Stations,
 		 * hence do set key for all link STAs which are active.
 		 */
@@ -4394,41 +4395,47 @@ static int ath12k_mac_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 				if (ret)
 					break;
 			}
-		} else {
-			arsta = &ahsta->deflink;
-			arvif = arsta->arvif;
-			if (WARN_ON(!arvif)) {
-				ret = -EINVAL;
-				goto out;
-			}
 
-			ret = ath12k_mac_set_key(arvif->ar, cmd, arvif, arsta, key);
-		}
-	} else {
-		if (key->link_id >= 0 && key->link_id < IEEE80211_MLD_MAX_NUM_LINKS) {
-			link_id = key->link_id;
-			arvif = wiphy_dereference(hw->wiphy, ahvif->link[link_id]);
-		} else {
-			link_id = 0;
-			arvif = &ahvif->deflink;
+			return 0;
 		}
 
-		if (!arvif || !arvif->is_created) {
-			cache = ath12k_ahvif_get_link_cache(ahvif, link_id);
-			if (!cache)
-				return -ENOSPC;
+		arsta = &ahsta->deflink;
+		arvif = arsta->arvif;
+		if (WARN_ON(!arvif))
+			return -EINVAL;
 
-			ret = ath12k_mac_update_key_cache(cache, cmd, sta, key);
+		ret = ath12k_mac_set_key(arvif->ar, cmd, arvif, arsta, key);
+		if (ret)
+			return ret;
 
+		return 0;
+	}
+
+	if (key->link_id >= 0 && key->link_id < IEEE80211_MLD_MAX_NUM_LINKS) {
+		link_id = key->link_id;
+		arvif = wiphy_dereference(hw->wiphy, ahvif->link[link_id]);
+	} else {
+		link_id = 0;
+		arvif = &ahvif->deflink;
+	}
+
+	if (!arvif || !arvif->is_created) {
+		cache = ath12k_ahvif_get_link_cache(ahvif, link_id);
+		if (!cache)
+			return -ENOSPC;
+
+		ret = ath12k_mac_update_key_cache(cache, cmd, sta, key);
+		if (ret)
 			return ret;
-		}
 
-		ret = ath12k_mac_set_key(arvif->ar, cmd, arvif, NULL, key);
+		return 0;
 	}
 
-out:
+	ret = ath12k_mac_set_key(arvif->ar, cmd, arvif, NULL, key);
+	if (ret)
+		return ret;
 
-	return ret;
+	return 0;
 }
 
 static int
-- 
2.39.5