b43: use enum for firmware header format

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/b43.h

@@ -694,6 +694,11 @@ struct b43_firmware_file {
 	enum b43_firmware_file_type type;
 };
 
+enum b43_firmware_hdr_format {
+	B43_FW_HDR_410,
+	B43_FW_HDR_351,
+};
+
 /* Pointers to the firmware data and meta information about it. */
 struct b43_firmware {
 	/* Microcode */
@@ -710,6 +715,9 @@ struct b43_firmware {
 	/* Firmware patchlevel */
 	u16 patch;
 
+	/* Format of header used by firmware */
+	enum b43_firmware_hdr_format hdr_format;
+
 	/* Set to true, if we are using an opensource firmware.
 	 * Use this to check for proprietary vs opensource. */
 	bool opensource;

drivers/net/wireless/b43/main.c

@@ -2514,6 +2514,10 @@ static int b43_upload_microcode(struct b43_wldev *dev)
 	}
 	dev->fw.rev = fwrev;
 	dev->fw.patch = fwpatch;
+	if (dev->fw.rev >= 410)
+		dev->fw.hdr_format = B43_FW_HDR_410;
+	else
+		dev->fw.hdr_format = B43_FW_HDR_351;
 	dev->fw.opensource = (fwdate == 0xFFFF);
 
 	/* Default to use-all-queues. */
@@ -2561,7 +2565,7 @@ static int b43_upload_microcode(struct b43_wldev *dev)
 			dev->fw.rev, dev->fw.patch);
 	wiphy->hw_version = dev->dev->core_id;
 
-	if (b43_is_old_txhdr_format(dev)) {
+	if (dev->fw.hdr_format == B43_FW_HDR_351) {
 		/* We're over the deadline, but we keep support for old fw
 		 * until it turns out to be in major conflict with something new. */
 		b43warn(dev->wl, "You are using an old firmware image. "

drivers/net/wireless/b43/xmit.c

@@ -337,12 +337,15 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 			memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
 		}
 	}
-	if (b43_is_old_txhdr_format(dev)) {
+	switch (dev->fw.hdr_format) {
+	case B43_FW_HDR_351:
 		b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_351.plcp),
 				      plcp_fragment_len, rate);
-	} else {
+		break;
+	case B43_FW_HDR_410:
 		b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->format_410.plcp),
 				      plcp_fragment_len, rate);
+		break;
 	}
 	b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
 			      plcp_fragment_len, rate_fb);
@@ -415,10 +418,10 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 	if ((rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) ||
 	    (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)) {
 		unsigned int len;
-		struct ieee80211_hdr *hdr;
+		struct ieee80211_hdr *uninitialized_var(hdr);
 		int rts_rate, rts_rate_fb;
 		int rts_rate_ofdm, rts_rate_fb_ofdm;
-		struct b43_plcp_hdr6 *plcp;
+		struct b43_plcp_hdr6 *uninitialized_var(plcp);
 		struct ieee80211_rate *rts_cts_rate;
 
 		rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info);
@@ -429,29 +432,35 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 		rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
 
 		if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
-			struct ieee80211_cts *cts;
+			struct ieee80211_cts *uninitialized_var(cts);
 
-			if (b43_is_old_txhdr_format(dev)) {
+			switch (dev->fw.hdr_format) {
+			case B43_FW_HDR_351:
 				cts = (struct ieee80211_cts *)
 					(txhdr->format_351.rts_frame);
-			} else {
+				break;
+			case B43_FW_HDR_410:
 				cts = (struct ieee80211_cts *)
 					(txhdr->format_410.rts_frame);
+				break;
 			}
 			ieee80211_ctstoself_get(dev->wl->hw, info->control.vif,
 						fragment_data, fragment_len,
 						info, cts);
 			mac_ctl |= B43_TXH_MAC_SENDCTS;
 			len = sizeof(struct ieee80211_cts);
 		} else {
-			struct ieee80211_rts *rts;
+			struct ieee80211_rts *uninitialized_var(rts);
 
-			if (b43_is_old_txhdr_format(dev)) {
+			switch (dev->fw.hdr_format) {
+			case B43_FW_HDR_351:
 				rts = (struct ieee80211_rts *)
 					(txhdr->format_351.rts_frame);
-			} else {
+				break;
+			case B43_FW_HDR_410:
 				rts = (struct ieee80211_rts *)
 					(txhdr->format_410.rts_frame);
+				break;
 			}
 			ieee80211_rts_get(dev->wl->hw, info->control.vif,
 					  fragment_data, fragment_len,
@@ -462,22 +471,29 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 		len += FCS_LEN;
 
 		/* Generate the PLCP headers for the RTS/CTS frame */
-		if (b43_is_old_txhdr_format(dev))
+		switch (dev->fw.hdr_format) {
+		case B43_FW_HDR_351:
 			plcp = &txhdr->format_351.rts_plcp;
-		else
+			break;
+		case B43_FW_HDR_410:
 			plcp = &txhdr->format_410.rts_plcp;
+			break;
+		}
 		b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
 				      len, rts_rate);
 		plcp = &txhdr->rts_plcp_fb;
 		b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
 				      len, rts_rate_fb);
 
-		if (b43_is_old_txhdr_format(dev)) {
+		switch (dev->fw.hdr_format) {
+		case B43_FW_HDR_351:
 			hdr = (struct ieee80211_hdr *)
 				(&txhdr->format_351.rts_frame);
-		} else {
+			break;
+		case B43_FW_HDR_410:
 			hdr = (struct ieee80211_hdr *)
 				(&txhdr->format_410.rts_frame);
+			break;
 		}
 		txhdr->rts_dur_fb = hdr->duration_id;
 
@@ -505,10 +521,14 @@ int b43_generate_txhdr(struct b43_wldev *dev,
 	}
 
 	/* Magic cookie */
-	if (b43_is_old_txhdr_format(dev))
+	switch (dev->fw.hdr_format) {
+	case B43_FW_HDR_351:
 		txhdr->format_351.cookie = cpu_to_le16(cookie);
-	else
+		break;
+	case B43_FW_HDR_410:
 		txhdr->format_410.cookie = cpu_to_le16(cookie);
+		break;
+	}
 
 	if (phy->type == B43_PHYTYPE_N) {
 		txhdr->phy_ctl1 =

drivers/net/wireless/b43/xmit.h

@@ -166,19 +166,16 @@ struct b43_tx_legacy_rate_phy_ctl_entry {
 #define  B43_TXH_PHY1_MODUL_QAM256	0x2000 /* QAM256 */
 
 
-/* r351 firmware compatibility stuff. */
-static inline
-bool b43_is_old_txhdr_format(struct b43_wldev *dev)
-{
-	return (dev->fw.rev <= 351);
-}
-
 static inline
 size_t b43_txhdr_size(struct b43_wldev *dev)
 {
-	if (b43_is_old_txhdr_format(dev))
+	switch (dev->fw.hdr_format) {
+	case B43_FW_HDR_410:
+		return 104 + sizeof(struct b43_plcp_hdr6);
+	case B43_FW_HDR_351:
 		return 100 + sizeof(struct b43_plcp_hdr6);
-	return 104 + sizeof(struct b43_plcp_hdr6);
+	}
+	return 0;
 }