staging: brcm80211: convert endianess before handling the frame

The received frame from the device is in little-endian order and
converted in the receive path. However, the phy code was doing
the rssi calculation with packet in LE order. This has been changed
to do the le_to_cpu conversion before doing the rssi computation
and further receive processing.

Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmsmac/main.c

@@ -813,11 +813,23 @@ brcms_b_recv(struct brcms_hardware *wlc_hw, uint fifo, bool bound)
 		wlc_rxhdr = (struct brcms_d11rxhdr *) p->data;
 		rxh = (struct d11rxhdr *)p->data;
 
+		/* fixup rx header endianness */
+		rxh->RxFrameSize = le16_to_cpu(rxh->RxFrameSize);
+		rxh->PhyRxStatus_0 = le16_to_cpu(rxh->PhyRxStatus_0);
+		rxh->PhyRxStatus_1 = le16_to_cpu(rxh->PhyRxStatus_1);
+		rxh->PhyRxStatus_2 = le16_to_cpu(rxh->PhyRxStatus_2);
+		rxh->PhyRxStatus_3 = le16_to_cpu(rxh->PhyRxStatus_3);
+		rxh->PhyRxStatus_4 = le16_to_cpu(rxh->PhyRxStatus_4);
+		rxh->PhyRxStatus_5 = le16_to_cpu(rxh->PhyRxStatus_5);
+		rxh->RxStatus1 = le16_to_cpu(rxh->RxStatus1);
+		rxh->RxStatus2 = le16_to_cpu(rxh->RxStatus2);
+		rxh->RxTSFTime = le16_to_cpu(rxh->RxTSFTime);
+		rxh->RxChan = le16_to_cpu(rxh->RxChan);
+
 		/*
 		 * compute the RSSI from d11rxhdr and record it in wlc_rxd11hr
 		 */
 		wlc_rxhdr->rssi = wlc_phy_rssi_compute(wlc_hw->band->pi, rxh);
-
 		brcms_c_recv(wlc_hw->wlc, p);
 	}
 
@@ -8289,19 +8301,6 @@ void brcms_c_recv(struct brcms_c_info *wlc, struct sk_buff *p)
 	/* strip off rxhdr */
 	skb_pull(p, BRCMS_HWRXOFF);
 
-	/* fixup rx header endianness */
-	rxh->RxFrameSize = le16_to_cpu(rxh->RxFrameSize);
-	rxh->PhyRxStatus_0 = le16_to_cpu(rxh->PhyRxStatus_0);
-	rxh->PhyRxStatus_1 = le16_to_cpu(rxh->PhyRxStatus_1);
-	rxh->PhyRxStatus_2 = le16_to_cpu(rxh->PhyRxStatus_2);
-	rxh->PhyRxStatus_3 = le16_to_cpu(rxh->PhyRxStatus_3);
-	rxh->PhyRxStatus_4 = le16_to_cpu(rxh->PhyRxStatus_4);
-	rxh->PhyRxStatus_5 = le16_to_cpu(rxh->PhyRxStatus_5);
-	rxh->RxStatus1 = le16_to_cpu(rxh->RxStatus1);
-	rxh->RxStatus2 = le16_to_cpu(rxh->RxStatus2);
-	rxh->RxTSFTime = le16_to_cpu(rxh->RxTSFTime);
-	rxh->RxChan = le16_to_cpu(rxh->RxChan);
-
 	/* MAC inserts 2 pad bytes for a4 headers or QoS or A-MSDU subframes */
 	if (rxh->RxStatus1 & RXS_PBPRES) {
 		if (p->len < 2) {

drivers/staging/brcm80211/brcmsmac/phy/phy_cmn.c

@@ -2613,18 +2613,18 @@ void wlc_phy_compute_dB(u32 *cmplx_pwr, s8 *p_cmplx_pwr_dB, u8 core)
 int wlc_phy_rssi_compute(struct brcms_phy_pub *pih,
 			 struct d11rxhdr *rxh)
 {
-	int rssi = le16_to_cpu(rxh->PhyRxStatus_1) & PRXS1_JSSI_MASK;
+	int rssi = rxh->PhyRxStatus_1 & PRXS1_JSSI_MASK;
 	uint radioid = pih->radioid;
 	struct brcms_phy *pi = (struct brcms_phy *) pih;
 
 	if ((pi->sh->corerev >= 11)
-	    && !(le16_to_cpu(rxh->RxStatus2) & RXS_PHYRXST_VALID)) {
+	    && !(rxh->RxStatus2 & RXS_PHYRXST_VALID)) {
 		rssi = BRCMS_RSSI_INVALID;
 		goto end;
 	}
 
 	if (ISLCNPHY(pi)) {
-		u8 gidx = (le16_to_cpu(rxh->PhyRxStatus_2) & 0xFC00) >> 10;
+		u8 gidx = (rxh->PhyRxStatus_2 & 0xFC00) >> 10;
 		struct brcms_phy_lcnphy *pi_lcn = pi->u.pi_lcnphy;
 
 		if (rssi > 127)

drivers/staging/brcm80211/brcmsmac/phy/phy_n.c

@@ -23115,16 +23115,16 @@ wlc_phy_rssi_compute_nphy(struct brcms_phy *pi, struct d11rxhdr *rxh)
 	s16 phyRx0_l, phyRx2_l;
 
 	rxpwr = 0;
-	rxpwr0 = le16_to_cpu(rxh->PhyRxStatus_1) & PRXS1_nphy_PWR0_MASK;
-	rxpwr1 = (le16_to_cpu(rxh->PhyRxStatus_1) & PRXS1_nphy_PWR1_MASK) >> 8;
+	rxpwr0 = rxh->PhyRxStatus_1 & PRXS1_nphy_PWR0_MASK;
+	rxpwr1 = (rxh->PhyRxStatus_1 & PRXS1_nphy_PWR1_MASK) >> 8;
 
 	if (rxpwr0 > 127)
 		rxpwr0 -= 256;
 	if (rxpwr1 > 127)
 		rxpwr1 -= 256;
 
-	phyRx0_l = le16_to_cpu(rxh->PhyRxStatus_0) & 0x00ff;
-	phyRx2_l = le16_to_cpu(rxh->PhyRxStatus_2) & 0x00ff;
+	phyRx0_l = rxh->PhyRxStatus_0 & 0x00ff;
+	phyRx2_l = rxh->PhyRxStatus_2 & 0x00ff;
 	if (phyRx2_l > 127)
 		phyRx2_l -= 256;