brcmfmac: create common function for handling brcmf_proto_hdrpull()

In receive path brcmf_proto_hdrpull() needs to be called and handled
similar in brcmf_rx_frame() and brcmf_rx_event(). Move that duplicated
code in separate function.
Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c

@@ -322,26 +322,35 @@ void brcmf_netif_rx(struct brcmf_if *ifp, struct sk_buff *skb)
 		netif_rx_ni(skb);
 }
 
-void brcmf_rx_frame(struct device *dev, struct sk_buff *skb, bool handle_event)
+static int brcmf_rx_hdrpull(struct brcmf_pub *drvr, struct sk_buff *skb,
+			    struct brcmf_if **ifp)
 {
-	struct brcmf_if *ifp;
-	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
-	struct brcmf_pub *drvr = bus_if->drvr;
 	int ret;
 
-	brcmf_dbg(DATA, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
-
 	/* process and remove protocol-specific header */
-	ret = brcmf_proto_hdrpull(drvr, true, skb, &ifp);
+	ret = brcmf_proto_hdrpull(drvr, true, skb, ifp);
 
-	if (ret || !ifp || !ifp->ndev) {
+	if (ret || !(*ifp) || !(*ifp)->ndev) {
 		if (ret != -ENODATA && ifp)
-			ifp->stats.rx_errors++;
+			(*ifp)->stats.rx_errors++;
 		brcmu_pkt_buf_free_skb(skb);
-		return;
+		return -ENODATA;
 	}
 
-	skb->protocol = eth_type_trans(skb, ifp->ndev);
+	skb->protocol = eth_type_trans(skb, (*ifp)->ndev);
+	return 0;
+}
+
+void brcmf_rx_frame(struct device *dev, struct sk_buff *skb, bool handle_event)
+{
+	struct brcmf_if *ifp;
+	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
+	struct brcmf_pub *drvr = bus_if->drvr;
+
+	brcmf_dbg(DATA, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
+
+	if (brcmf_rx_hdrpull(drvr, skb, &ifp))
+		return;
 
 	if (brcmf_proto_is_reorder_skb(skb)) {
 		brcmf_proto_rxreorder(ifp, skb);
@@ -359,21 +368,11 @@ void brcmf_rx_event(struct device *dev, struct sk_buff *skb)
 	struct brcmf_if *ifp;
 	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 	struct brcmf_pub *drvr = bus_if->drvr;
-	int ret;
 
 	brcmf_dbg(EVENT, "Enter: %s: rxp=%p\n", dev_name(dev), skb);
 
-	/* process and remove protocol-specific header */
-	ret = brcmf_proto_hdrpull(drvr, true, skb, &ifp);
-
-	if (ret || !ifp || !ifp->ndev) {
-		if (ret != -ENODATA && ifp)
-			ifp->stats.rx_errors++;
-		brcmu_pkt_buf_free_skb(skb);
+	if (brcmf_rx_hdrpull(drvr, skb, &ifp))
 		return;
-	}
-
-	skb->protocol = eth_type_trans(skb, ifp->ndev);
 
 	brcmf_fweh_process_skb(ifp->drvr, skb);
 	brcmu_pkt_buf_free_skb(skb);