wifi: rtlwifi: use helper function rtl_get_hdr()

Although rtl_get_hdr was added in commit 3dad618b ("rtlwifi: Change
wifi.h for rtl8192se and rtl8192de"), it is currently not being utilized
in some areas. This commit replaces the open code with the rtl_get_hdr()
function.
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230527114954.3281-1-claudiajkang@gmail.com

drivers/net/wireless/realtek/rtlwifi/base.c

@@ -1905,7 +1905,7 @@ EXPORT_SYMBOL(rtl_rx_ampdu_apply);
 void rtl_beacon_statistic(struct ieee80211_hw *hw, struct sk_buff *skb)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 
 	if (rtlpriv->mac80211.opmode != NL80211_IFTYPE_STATION)
 		return;
@@ -1991,7 +1991,7 @@ void rtl_scan_list_expire(struct ieee80211_hw *hw)
 void rtl_collect_scan_list(struct ieee80211_hw *hw, struct sk_buff *skb)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 	unsigned long flags;
 

drivers/net/wireless/realtek/rtlwifi/rtl8188ee/trx.c

@@ -674,7 +674,7 @@ void rtl88ee_tx_fill_cmddesc(struct ieee80211_hw *hw,
 	u8 fw_queue = QSLT_BEACON;
 	__le32 *pdesc = (__le32 *)pdesc8;
 
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	__le16 fc = hdr->frame_control;
 
 	dma_addr_t mapping = dma_map_single(&rtlpci->pdev->dev, skb->data,

drivers/net/wireless/realtek/rtlwifi/rtl8192ce/trx.c

@@ -527,7 +527,7 @@ void rtl92ce_tx_fill_cmddesc(struct ieee80211_hw *hw,
 	u8 fw_queue = QSLT_BEACON;
 	__le32 *pdesc = (__le32 *)pdesc8;
 
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	__le16 fc = hdr->frame_control;
 
 	dma_addr_t mapping = dma_map_single(&rtlpci->pdev->dev, skb->data,

drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c

@@ -394,7 +394,7 @@ static void _rtl_rx_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 				 (struct rx_desc_92c *)rxdesc, p_drvinfo);
 	}
 	skb_pull(skb, (drvinfo_len + RTL_RX_DESC_SIZE));
-	hdr = (struct ieee80211_hdr *)(skb->data);
+	hdr = rtl_get_hdr(skb);
 	fc = hdr->frame_control;
 	bv = ieee80211_is_probe_resp(fc);
 	if (bv)
@@ -632,7 +632,7 @@ void rtl92cu_tx_fill_cmddesc(struct ieee80211_hw *hw,
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	u8 fw_queue = QSLT_BEACON;
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	__le16 fc = hdr->frame_control;
 	__le32 *pdesc = (__le32 *)pdesc8;
 

drivers/net/wireless/realtek/rtlwifi/rtl8192de/trx.c

@@ -665,7 +665,7 @@ void rtl92de_tx_fill_cmddesc(struct ieee80211_hw *hw,
 	struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
 	u8 fw_queue = QSLT_BEACON;
 
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	__le16 fc = hdr->frame_control;
 	__le32 *pdesc = (__le32 *)pdesc8;
 

drivers/net/wireless/realtek/rtlwifi/rtl8723ae/trx.c

@@ -528,7 +528,7 @@ void rtl8723e_tx_fill_cmddesc(struct ieee80211_hw *hw,
 	u8 fw_queue = QSLT_BEACON;
 	__le32 *pdesc = (__le32 *)pdesc8;
 
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	__le16 fc = hdr->frame_control;
 
 	dma_addr_t mapping = dma_map_single(&rtlpci->pdev->dev, skb->data,

drivers/net/wireless/realtek/rtlwifi/usb.c

@@ -433,7 +433,7 @@ static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 	skb_pull(skb, RTL_RX_DESC_SIZE);
 	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
-	hdr = (struct ieee80211_hdr *)(skb->data);
+	hdr = rtl_get_hdr(skb);
 	fc = hdr->frame_control;
 	if (!stats.crc) {
 		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
@@ -475,7 +475,7 @@ static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 	skb_pull(skb, RTL_RX_DESC_SIZE);
 	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
-	hdr = (struct ieee80211_hdr *)(skb->data);
+	hdr = rtl_get_hdr(skb);
 	fc = hdr->frame_control;
 	if (!stats.crc) {
 		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
@@ -926,7 +926,7 @@ static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct rtl_tx_desc *pdesc = NULL;
 	struct rtl_tcb_desc tcb_desc;
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	__le16 fc = hdr->frame_control;
 	u8 *pda_addr = hdr->addr1;
 
@@ -961,7 +961,7 @@ static int rtl_usb_tx(struct ieee80211_hw *hw,
 {
 	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+	struct ieee80211_hdr *hdr = rtl_get_hdr(skb);
 	__le16 fc = hdr->frame_control;
 	u16 hw_queue;