[PATCH ath-next 2/2] wifi: ath12k: avoid multiple skb_cb fetch in ath12k_mac_mgmt_tx_wmi()

[Rameshkumar Sundaram <rameshkumar.sundaram@xxxxxxxxxxxxxxxx>]

ath12k_mac_mgmt_tx_wmi() fetches ath12k's skb_cb space multiple times from
TX skb which is redundant operation. Save the skb_cb in a local pointer
and use the same instead.

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

Signed-off-by: Rameshkumar Sundaram <rameshkumar.sundaram@xxxxxxxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath12k/mac.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index a1e5d94b400d..0fa5c9df19b2 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -7095,6 +7095,7 @@ static int ath12k_mac_mgmt_tx_wmi(struct ath12k *ar, struct ath12k_link_vif *arv
 {
 	struct ath12k_base *ab = ar->ab;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ath12k_skb_cb *skb_cb = ATH12K_SKB_CB(skb);
 	struct ieee80211_tx_info *info;
 	enum hal_encrypt_type enctype;
 	unsigned int mic_len;
@@ -7104,7 +7105,7 @@ static int ath12k_mac_mgmt_tx_wmi(struct ath12k *ar, struct ath12k_link_vif *arv
 
 	lockdep_assert_wiphy(ath12k_ar_to_hw(ar)->wiphy);
 
-	ATH12K_SKB_CB(skb)->ar = ar;
+	skb_cb->ar = ar;
 	spin_lock_bh(&ar->txmgmt_idr_lock);
 	buf_id = idr_alloc(&ar->txmgmt_idr, skb, 0,
 			   ATH12K_TX_MGMT_NUM_PENDING_MAX, GFP_ATOMIC);
@@ -7113,14 +7114,13 @@ static int ath12k_mac_mgmt_tx_wmi(struct ath12k *ar, struct ath12k_link_vif *arv
 		return -ENOSPC;
 
 	info = IEEE80211_SKB_CB(skb);
-	if ((ATH12K_SKB_CB(skb)->flags & ATH12K_SKB_CIPHER_SET) &&
+	if ((skb_cb->flags & ATH12K_SKB_CIPHER_SET) &&
 	    !(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP)) {
 		if ((ieee80211_is_action(hdr->frame_control) ||
 		     ieee80211_is_deauth(hdr->frame_control) ||
 		     ieee80211_is_disassoc(hdr->frame_control)) &&
 		     ieee80211_has_protected(hdr->frame_control)) {
-			enctype =
-			    ath12k_dp_tx_get_encrypt_type(ATH12K_SKB_CB(skb)->cipher);
+			enctype = ath12k_dp_tx_get_encrypt_type(skb_cb->cipher);
 			mic_len = ath12k_dp_rx_crypto_mic_len(ar, enctype);
 			skb_put(skb, mic_len);
 		}
@@ -7133,7 +7133,7 @@ static int ath12k_mac_mgmt_tx_wmi(struct ath12k *ar, struct ath12k_link_vif *arv
 		goto err_free_idr;
 	}
 
-	ATH12K_SKB_CB(skb)->paddr = paddr;
+	skb_cb->paddr = paddr;
 
 	ret = ath12k_wmi_mgmt_send(ar, arvif->vdev_id, buf_id, skb);
 	if (ret) {
@@ -7144,7 +7144,7 @@ static int ath12k_mac_mgmt_tx_wmi(struct ath12k *ar, struct ath12k_link_vif *arv
 	return 0;
 
 err_unmap_buf:
-	dma_unmap_single(ab->dev, ATH12K_SKB_CB(skb)->paddr,
+	dma_unmap_single(ab->dev, skb_cb->paddr,
 			 skb->len, DMA_TO_DEVICE);
 err_free_idr:
 	spin_lock_bh(&ar->txmgmt_idr_lock);
-- 
2.34.1