wifi: ath12k: remove redundant logic for initializing arvif

The current logic for initializing arvif is present in both the add
interface operation callback and ath12k_mac_assign_link_vif(). The former
handles deflink initialization, while the latter is responsible for other
links. This redundancy could be avoided by using a common helper function.

Hence, add a new helper ath12k_mac_init_arvif() which initializes a
given arvif.

Since synchronizing rcu is not required after adding a rcu pointer, remove
that now.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00130-QCAHKSWPL_SILICONZ-1.97421.5 # Nicolas Escande

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Tested-by: Nicolas Escande <nico.escande@gmail.com>
Link: https://patch.msgid.link/20250204-unlink_link_arvif_from_chanctx-v2-4-764fb5973c1a@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

1 files changed, 49 insertions, 31 deletions

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 7168b268b4a1..b7f605eeb254 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -3974,13 +3974,59 @@ static void ath12k_mac_op_link_info_changed(struct ieee80211_hw *hw,
 	ath12k_mac_bss_info_changed(ar, arvif, info, changed);
 }
 
+static void ath12k_mac_init_arvif(struct ath12k_vif *ahvif,
+				  struct ath12k_link_vif *arvif, int link_id)
+{
+	struct ath12k_hw *ah = ahvif->ah;
+	u8 _link_id;
+	int i;
+
+	lockdep_assert_wiphy(ah->hw->wiphy);
+
+	if (WARN_ON(!arvif))
+		return;
+
+	if (WARN_ON(link_id >= ATH12K_NUM_MAX_LINKS))
+		return;
+
+	if (link_id < 0)
+		_link_id = 0;
+	else
+		_link_id = link_id;
+
+	arvif->ahvif = ahvif;
+	arvif->link_id = _link_id;
+
+	INIT_LIST_HEAD(&arvif->list);
+	INIT_DELAYED_WORK(&arvif->connection_loss_work,
+			  ath12k_mac_vif_sta_connection_loss_work);
+
+	for (i = 0; i < ARRAY_SIZE(arvif->bitrate_mask.control); i++) {
+		arvif->bitrate_mask.control[i].legacy = 0xffffffff;
+		memset(arvif->bitrate_mask.control[i].ht_mcs, 0xff,
+		       sizeof(arvif->bitrate_mask.control[i].ht_mcs));
+		memset(arvif->bitrate_mask.control[i].vht_mcs, 0xff,
+		       sizeof(arvif->bitrate_mask.control[i].vht_mcs));
+	}
+
+	/* Handle MLO related assignments */
+	if (link_id >= 0) {
+		rcu_assign_pointer(ahvif->link[arvif->link_id], arvif);
+		ahvif->links_map |= BIT(_link_id);
+	}
+
+	ath12k_generic_dbg(ATH12K_DBG_MAC,
+			   "mac init link arvif (link_id %d%s) for vif %pM. links_map 0x%x",
+			   _link_id, (link_id < 0) ? " deflink" : "", ahvif->vif->addr,
+			   ahvif->links_map);
+}
+
 static struct ath12k_link_vif *ath12k_mac_assign_link_vif(struct ath12k_hw *ah,
 							  struct ieee80211_vif *vif,
 							  u8 link_id)
 {
 	struct ath12k_vif *ahvif = ath12k_vif_to_ahvif(vif);
 	struct ath12k_link_vif *arvif;
-	int i;
 
 	lockdep_assert_wiphy(ah->hw->wiphy);
 
@@ -4007,25 +4053,8 @@ static struct ath12k_link_vif *ath12k_mac_assign_link_vif(struct ath12k_hw *ah,
 		}
 	}
 
-	arvif->ahvif = ahvif;
-	arvif->link_id = link_id;
-	ahvif->links_map |= BIT(link_id);
-
-	INIT_LIST_HEAD(&arvif->list);
-	INIT_DELAYED_WORK(&arvif->connection_loss_work,
-			  ath12k_mac_vif_sta_connection_loss_work);
-
-	for (i = 0; i < ARRAY_SIZE(arvif->bitrate_mask.control); i++) {
-		arvif->bitrate_mask.control[i].legacy = 0xffffffff;
-		memset(arvif->bitrate_mask.control[i].ht_mcs, 0xff,
-		       sizeof(arvif->bitrate_mask.control[i].ht_mcs));
-		memset(arvif->bitrate_mask.control[i].vht_mcs, 0xff,
-		       sizeof(arvif->bitrate_mask.control[i].vht_mcs));
-	}
+	ath12k_mac_init_arvif(ahvif, arvif, link_id);
 
-	rcu_assign_pointer(ahvif->link[arvif->link_id], arvif);
-	ahvif->links_map |= BIT(link_id);
-	synchronize_rcu();
 	return arvif;
 }
 
@@ -8318,19 +8347,8 @@ static int ath12k_mac_op_add_interface(struct ieee80211_hw *hw,
 	ahvif->ah = ah;
 	ahvif->vif = vif;
 	arvif = &ahvif->deflink;
-	arvif->ahvif = ahvif;
-
-	INIT_LIST_HEAD(&arvif->list);
-	INIT_DELAYED_WORK(&arvif->connection_loss_work,
-			  ath12k_mac_vif_sta_connection_loss_work);
 
-	for (i = 0; i < ARRAY_SIZE(arvif->bitrate_mask.control); i++) {
-		arvif->bitrate_mask.control[i].legacy = 0xffffffff;
-		memset(arvif->bitrate_mask.control[i].ht_mcs, 0xff,
-		       sizeof(arvif->bitrate_mask.control[i].ht_mcs));
-		memset(arvif->bitrate_mask.control[i].vht_mcs, 0xff,
-		       sizeof(arvif->bitrate_mask.control[i].vht_mcs));
-	}
+	ath12k_mac_init_arvif(ahvif, arvif, -1);
 
 	/* Allocate Default Queue now and reassign during actual vdev create */
 	vif->cab_queue = ATH12K_HW_DEFAULT_QUEUE;