Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem

Documentation/devicetree/bindings/net/nfc/trf7970a.txt

@@ -0,0 +1,34 @@
+* Texas Instruments TRF7970A RFID/NFC/15693 Transceiver
+
+Required properties:
+- compatible: Should be "ti,trf7970a".
+- spi-max-frequency: Maximum SPI frequency (<= 2000000).
+- interrupt-parent: phandle of parent interrupt handler.
+- interrupts: A single interrupt specifier.
+- ti,enable-gpios: Two GPIO entries used for 'EN' and 'EN2' pins on the
+  TRF7970A.
+- vin-supply: Regulator for supply voltage to VIN pin
+
+Optional SoC Specific Properties:
+- pinctrl-names: Contains only one value - "default".
+- pintctrl-0: Specifies the pin control groups used for this controller.
+
+Example (for ARM-based BeagleBone with TRF7970A on SPI1):
+
+&spi1 {
+	status = "okay";
+
+	nfc@0 {
+		compatible = "ti,trf7970a";
+		reg = <0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&trf7970a_default>;
+		spi-max-frequency = <2000000>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <14 0>;
+		ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>,
+				  <&gpio2 5 GPIO_ACTIVE_LOW>;
+		vin-supply = <&ldo3_reg>;
+		status = "okay";
+	};
+};

MAINTAINERS

@@ -6117,6 +6117,7 @@ F:	include/net/nfc/
 F:	include/uapi/linux/nfc.h
 F:	drivers/nfc/
 F:	include/linux/platform_data/pn544.h
+F:	Documentation/devicetree/bindings/net/nfc/
 
 NFS, SUNRPC, AND LOCKD CLIENTS
 M:	Trond Myklebust <trond.myklebust@primarydata.com>

drivers/bluetooth/ath3k.c

@@ -89,6 +89,7 @@ static const struct usb_device_id ath3k_table[] = {
 	{ USB_DEVICE(0x0b05, 0x17d0) },
 	{ USB_DEVICE(0x0CF3, 0x0036) },
 	{ USB_DEVICE(0x0CF3, 0x3004) },
+	{ USB_DEVICE(0x0CF3, 0x3005) },
 	{ USB_DEVICE(0x0CF3, 0x3008) },
 	{ USB_DEVICE(0x0CF3, 0x311D) },
 	{ USB_DEVICE(0x0CF3, 0x311E) },
@@ -137,6 +138,7 @@ static const struct usb_device_id ath3k_blist_tbl[] = {
 	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x0cf3, 0x3005), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311E), .driver_info = BTUSB_ATH3012 },
@@ -180,10 +182,9 @@ static int ath3k_load_firmware(struct usb_device *udev,
 	}
 
 	memcpy(send_buf, firmware->data, 20);
-	if ((err = usb_control_msg(udev, pipe,
-				USB_REQ_DFU_DNLOAD,
-				USB_TYPE_VENDOR, 0, 0,
-				send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
+	err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
+			      0, 0, send_buf, 20, USB_CTRL_SET_TIMEOUT);
+	if (err < 0) {
 		BT_ERR("Can't change to loading configuration err");
 		goto error;
 	}
@@ -366,7 +367,7 @@ static int ath3k_load_patch(struct usb_device *udev)
 	}
 
 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
-		fw_version.rom_version);
+		le32_to_cpu(fw_version.rom_version));
 
 	ret = request_firmware(&firmware, filename, &udev->dev);
 	if (ret < 0) {
@@ -428,7 +429,7 @@ static int ath3k_load_syscfg(struct usb_device *udev)
 	}
 
 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
-		fw_version.rom_version, clk_value, ".dfu");
+		le32_to_cpu(fw_version.rom_version), clk_value, ".dfu");
 
 	ret = request_firmware(&firmware, filename, &udev->dev);
 	if (ret < 0) {

drivers/bluetooth/bfusb.c

@@ -131,8 +131,11 @@ static int bfusb_send_bulk(struct bfusb_data *data, struct sk_buff *skb)
 
 	BT_DBG("bfusb %p skb %p len %d", data, skb, skb->len);
 
-	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
-		return -ENOMEM;
+	if (!urb) {
+		urb = usb_alloc_urb(0, GFP_ATOMIC);
+		if (!urb)
+			return -ENOMEM;
+	}
 
 	pipe = usb_sndbulkpipe(data->udev, data->bulk_out_ep);
 
@@ -218,8 +221,11 @@ static int bfusb_rx_submit(struct bfusb_data *data, struct urb *urb)
 
 	BT_DBG("bfusb %p urb %p", data, urb);
 
-	if (!urb && !(urb = usb_alloc_urb(0, GFP_ATOMIC)))
-		return -ENOMEM;
+	if (!urb) {
+		urb = usb_alloc_urb(0, GFP_ATOMIC);
+		if (!urb)
+			return -ENOMEM;
+	}
 
 	skb = bt_skb_alloc(size, GFP_ATOMIC);
 	if (!skb) {

drivers/bluetooth/bluecard_cs.c

@@ -257,7 +257,8 @@ static void bluecard_write_wakeup(bluecard_info_t *info)
 			ready_bit = XMIT_BUF_ONE_READY;
 		}
 
-		if (!(skb = skb_dequeue(&(info->txq))))
+		skb = skb_dequeue(&(info->txq));
+		if (!skb)
 			break;
 
 		if (bt_cb(skb)->pkt_type & 0x80) {
@@ -391,7 +392,8 @@ static void bluecard_receive(bluecard_info_t *info, unsigned int offset)
 		if (info->rx_skb == NULL) {
 			info->rx_state = RECV_WAIT_PACKET_TYPE;
 			info->rx_count = 0;
-			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
+			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+			if (!info->rx_skb) {
 				BT_ERR("Can't allocate mem for new packet");
 				return;
 			}
@@ -566,7 +568,8 @@ static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud)
 	/* Ericsson baud rate command */
 	unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };
 
-	if (!(skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
+	skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+	if (!skb) {
 		BT_ERR("Can't allocate mem for new packet");
 		return -1;
 	}

drivers/bluetooth/bt3c_cs.c

@@ -193,8 +193,8 @@ static void bt3c_write_wakeup(bt3c_info_t *info)
 		if (!pcmcia_dev_present(info->p_dev))
 			break;
 
-
-		if (!(skb = skb_dequeue(&(info->txq)))) {
+		skb = skb_dequeue(&(info->txq));
+		if (!skb) {
 			clear_bit(XMIT_SENDING, &(info->tx_state));
 			break;
 		}
@@ -238,7 +238,8 @@ static void bt3c_receive(bt3c_info_t *info)
 		if (info->rx_skb == NULL) {
 			info->rx_state = RECV_WAIT_PACKET_TYPE;
 			info->rx_count = 0;
-			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
+			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+			if (!info->rx_skb) {
 				BT_ERR("Can't allocate mem for new packet");
 				return;
 			}

drivers/bluetooth/btuart_cs.c

@@ -149,7 +149,8 @@ static void btuart_write_wakeup(btuart_info_t *info)
 		if (!pcmcia_dev_present(info->p_dev))
 			return;
 
-		if (!(skb = skb_dequeue(&(info->txq))))
+		skb = skb_dequeue(&(info->txq));
+		if (!skb)
 			break;
 
 		/* Send frame */
@@ -190,7 +191,8 @@ static void btuart_receive(btuart_info_t *info)
 		if (info->rx_skb == NULL) {
 			info->rx_state = RECV_WAIT_PACKET_TYPE;
 			info->rx_count = 0;
-			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
+			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+			if (!info->rx_skb) {
 				BT_ERR("Can't allocate mem for new packet");
 				return;
 			}

drivers/bluetooth/btusb.c

@@ -159,6 +159,7 @@ static const struct usb_device_id blacklist_table[] = {
 	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x0cf3, 0x3005), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },

drivers/bluetooth/dtl1_cs.c

@@ -153,7 +153,8 @@ static void dtl1_write_wakeup(dtl1_info_t *info)
 		if (!pcmcia_dev_present(info->p_dev))
 			return;
 
-		if (!(skb = skb_dequeue(&(info->txq))))
+		skb = skb_dequeue(&(info->txq));
+		if (!skb)
 			break;
 
 		/* Send frame */
@@ -215,13 +216,15 @@ static void dtl1_receive(dtl1_info_t *info)
 		info->hdev->stat.byte_rx++;
 
 		/* Allocate packet */
-		if (info->rx_skb == NULL)
-			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
+		if (info->rx_skb == NULL) {
+			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+			if (!info->rx_skb) {
 				BT_ERR("Can't allocate mem for new packet");
 				info->rx_state = RECV_WAIT_NSH;
 				info->rx_count = NSHL;
 				return;
 			}
+		}
 
 		*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
 		nsh = (nsh_t *)info->rx_skb->data;

drivers/bluetooth/hci_bcsp.c

@@ -291,7 +291,8 @@ static struct sk_buff *bcsp_dequeue(struct hci_uart *hu)
 	/* First of all, check for unreliable messages in the queue,
 	   since they have priority */
 
-	if ((skb = skb_dequeue(&bcsp->unrel)) != NULL) {
+	skb = skb_dequeue(&bcsp->unrel);
+	if (skb != NULL) {
 		struct sk_buff *nskb = bcsp_prepare_pkt(bcsp, skb->data, skb->len, bt_cb(skb)->pkt_type);
 		if (nskb) {
 			kfree_skb(skb);
@@ -308,16 +309,20 @@ static struct sk_buff *bcsp_dequeue(struct hci_uart *hu)
 
 	spin_lock_irqsave_nested(&bcsp->unack.lock, flags, SINGLE_DEPTH_NESTING);
 
-	if (bcsp->unack.qlen < BCSP_TXWINSIZE && (skb = skb_dequeue(&bcsp->rel)) != NULL) {
-		struct sk_buff *nskb = bcsp_prepare_pkt(bcsp, skb->data, skb->len, bt_cb(skb)->pkt_type);
-		if (nskb) {
-			__skb_queue_tail(&bcsp->unack, skb);
-			mod_timer(&bcsp->tbcsp, jiffies + HZ / 4);
-			spin_unlock_irqrestore(&bcsp->unack.lock, flags);
-			return nskb;
-		} else {
-			skb_queue_head(&bcsp->rel, skb);
-			BT_ERR("Could not dequeue pkt because alloc_skb failed");
+	if (bcsp->unack.qlen < BCSP_TXWINSIZE) {
+		skb = skb_dequeue(&bcsp->rel);
+		if (skb != NULL) {
+			struct sk_buff *nskb = bcsp_prepare_pkt(bcsp, skb->data, skb->len,
+								bt_cb(skb)->pkt_type);
+			if (nskb) {
+				__skb_queue_tail(&bcsp->unack, skb);
+				mod_timer(&bcsp->tbcsp, jiffies + HZ / 4);
+				spin_unlock_irqrestore(&bcsp->unack.lock, flags);
+				return nskb;
+			} else {
+				skb_queue_head(&bcsp->rel, skb);
+				BT_ERR("Could not dequeue pkt because alloc_skb failed");
+			}
 		}
 	}
 
@@ -715,6 +720,9 @@ static int bcsp_open(struct hci_uart *hu)
 static int bcsp_close(struct hci_uart *hu)
 {
 	struct bcsp_struct *bcsp = hu->priv;
+
+	del_timer_sync(&bcsp->tbcsp);
+
 	hu->priv = NULL;
 
 	BT_DBG("hu %p", hu);
@@ -722,7 +730,6 @@ static int bcsp_close(struct hci_uart *hu)
 	skb_queue_purge(&bcsp->unack);
 	skb_queue_purge(&bcsp->rel);
 	skb_queue_purge(&bcsp->unrel);
-	del_timer(&bcsp->tbcsp);
 
 	kfree(bcsp);
 	return 0;

drivers/bluetooth/hci_h5.c

@@ -206,12 +206,12 @@ static int h5_close(struct hci_uart *hu)
 {
 	struct h5 *h5 = hu->priv;
 
+	del_timer_sync(&h5->timer);
+
 	skb_queue_purge(&h5->unack);
 	skb_queue_purge(&h5->rel);
 	skb_queue_purge(&h5->unrel);
 
-	del_timer(&h5->timer);
-
 	kfree(h5);
 
 	return 0;
@@ -673,7 +673,8 @@ static struct sk_buff *h5_dequeue(struct hci_uart *hu)
 		return h5_prepare_pkt(hu, HCI_3WIRE_LINK_PKT, wakeup_req, 2);
 	}
 
-	if ((skb = skb_dequeue(&h5->unrel)) != NULL) {
+	skb = skb_dequeue(&h5->unrel);
+	if (skb != NULL) {
 		nskb = h5_prepare_pkt(hu, bt_cb(skb)->pkt_type,
 				      skb->data, skb->len);
 		if (nskb) {
@@ -690,7 +691,8 @@ static struct sk_buff *h5_dequeue(struct hci_uart *hu)
 	if (h5->unack.qlen >= h5->tx_win)
 		goto unlock;
 
-	if ((skb = skb_dequeue(&h5->rel)) != NULL) {
+	skb = skb_dequeue(&h5->rel);
+	if (skb != NULL) {
 		nskb = h5_prepare_pkt(hu, bt_cb(skb)->pkt_type,
 				      skb->data, skb->len);
 		if (nskb) {

drivers/bluetooth/hci_ldisc.c

@@ -271,7 +271,8 @@ static int hci_uart_tty_open(struct tty_struct *tty)
 	if (tty->ops->write == NULL)
 		return -EOPNOTSUPP;
 
-	if (!(hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL))) {
+	hu = kzalloc(sizeof(struct hci_uart), GFP_KERNEL);
+	if (!hu) {
 		BT_ERR("Can't allocate control structure");
 		return -ENFILE;
 	}
@@ -569,7 +570,8 @@ static int __init hci_uart_init(void)
 	hci_uart_ldisc.write_wakeup	= hci_uart_tty_wakeup;
 	hci_uart_ldisc.owner		= THIS_MODULE;
 
-	if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
+	err = tty_register_ldisc(N_HCI, &hci_uart_ldisc);
+	if (err) {
 		BT_ERR("HCI line discipline registration failed. (%d)", err);
 		return err;
 	}
@@ -614,7 +616,8 @@ static void __exit hci_uart_exit(void)
 #endif
 
 	/* Release tty registration of line discipline */
-	if ((err = tty_unregister_ldisc(N_HCI)))
+	err = tty_unregister_ldisc(N_HCI);
+	if (err)
 		BT_ERR("Can't unregister HCI line discipline (%d)", err);
 }
 

drivers/net/wireless/Kconfig

@@ -116,7 +116,7 @@ config AT76C50X_USB
 
 config AIRO_CS
 	tristate "Cisco/Aironet 34X/35X/4500/4800 PCMCIA cards"
-	depends on PCMCIA && (BROKEN || !M32R)
+	depends on CFG80211 && PCMCIA && (BROKEN || !M32R)
 	select WIRELESS_EXT
 	select WEXT_SPY
 	select WEXT_PRIV
@@ -281,5 +281,6 @@ source "drivers/net/wireless/ti/Kconfig"
 source "drivers/net/wireless/zd1211rw/Kconfig"
 source "drivers/net/wireless/mwifiex/Kconfig"
 source "drivers/net/wireless/cw1200/Kconfig"
+source "drivers/net/wireless/rsi/Kconfig"
 
 endif # WLAN

drivers/net/wireless/Makefile

@@ -59,3 +59,4 @@ obj-$(CONFIG_BRCMFMAC)	+= brcm80211/
 obj-$(CONFIG_BRCMSMAC)	+= brcm80211/
 
 obj-$(CONFIG_CW1200)	+= cw1200/
+obj-$(CONFIG_RSI_91X)	+= rsi/

drivers/net/wireless/ath/ath.h

@@ -56,6 +56,15 @@ enum ath_device_state {
 	ATH_HW_INITIALIZED,
 };
 
+enum ath_op_flags {
+	ATH_OP_INVALID,
+	ATH_OP_BEACONS,
+	ATH_OP_ANI_RUN,
+	ATH_OP_PRIM_STA_VIF,
+	ATH_OP_HW_RESET,
+	ATH_OP_SCANNING,
+};
+
 enum ath_bus_type {
 	ATH_PCI,
 	ATH_AHB,
@@ -130,6 +139,7 @@ struct ath_common {
 	struct ieee80211_hw *hw;
 	int debug_mask;
 	enum ath_device_state state;
+	unsigned long op_flags;
 
 	struct ath_ani ani;
 

drivers/net/wireless/ath/ath10k/ce.c

@@ -266,12 +266,12 @@ static inline void ath10k_ce_engine_int_status_clear(struct ath10k *ar,
  * ath10k_ce_sendlist_send.
  * The caller takes responsibility for any needed locking.
  */
-static int ath10k_ce_send_nolock(struct ath10k_ce_pipe *ce_state,
-				 void *per_transfer_context,
-				 u32 buffer,
-				 unsigned int nbytes,
-				 unsigned int transfer_id,
-				 unsigned int flags)
+int ath10k_ce_send_nolock(struct ath10k_ce_pipe *ce_state,
+			  void *per_transfer_context,
+			  u32 buffer,
+			  unsigned int nbytes,
+			  unsigned int transfer_id,
+			  unsigned int flags)
 {
 	struct ath10k *ar = ce_state->ar;
 	struct ath10k_ce_ring *src_ring = ce_state->src_ring;
@@ -1067,9 +1067,9 @@ struct ath10k_ce_pipe *ath10k_ce_init(struct ath10k *ar,
 	 *
 	 * For the lack of a better place do the check here.
 	 */
-	BUILD_BUG_ON(TARGET_NUM_MSDU_DESC >
+	BUILD_BUG_ON(2*TARGET_NUM_MSDU_DESC >
 		     (CE_HTT_H2T_MSG_SRC_NENTRIES - 1));
-	BUILD_BUG_ON(TARGET_10X_NUM_MSDU_DESC >
+	BUILD_BUG_ON(2*TARGET_10X_NUM_MSDU_DESC >
 		     (CE_HTT_H2T_MSG_SRC_NENTRIES - 1));
 
 	ret = ath10k_pci_wake(ar);

drivers/net/wireless/ath/ath10k/ce.h

@@ -23,7 +23,7 @@
 
 /* Maximum number of Copy Engine's supported */
 #define CE_COUNT_MAX 8
-#define CE_HTT_H2T_MSG_SRC_NENTRIES 2048
+#define CE_HTT_H2T_MSG_SRC_NENTRIES 4096
 
 /* Descriptor rings must be aligned to this boundary */
 #define CE_DESC_RING_ALIGN	8
@@ -152,6 +152,13 @@ int ath10k_ce_send(struct ath10k_ce_pipe *ce_state,
 		   unsigned int transfer_id,
 		   unsigned int flags);
 
+int ath10k_ce_send_nolock(struct ath10k_ce_pipe *ce_state,
+			  void *per_transfer_context,
+			  u32 buffer,
+			  unsigned int nbytes,
+			  unsigned int transfer_id,
+			  unsigned int flags);
+
 void ath10k_ce_send_cb_register(struct ath10k_ce_pipe *ce_state,
 				void (*send_cb)(struct ath10k_ce_pipe *),
 				int disable_interrupts);

drivers/net/wireless/ath/ath10k/core.h

@@ -62,16 +62,13 @@ struct ath10k;
 
 struct ath10k_skb_cb {
 	dma_addr_t paddr;
-	bool is_mapped;
-	bool is_aborted;
 	u8 vdev_id;
 
 	struct {
 		u8 tid;
 		bool is_offchan;
-
-		u8 frag_len;
-		u8 pad_len;
+		struct ath10k_htt_txbuf *txbuf;
+		u32 txbuf_paddr;
 	} __packed htt;
 
 	struct {
@@ -87,32 +84,6 @@ static inline struct ath10k_skb_cb *ATH10K_SKB_CB(struct sk_buff *skb)
 	return (struct ath10k_skb_cb *)&IEEE80211_SKB_CB(skb)->driver_data;
 }
 
-static inline int ath10k_skb_map(struct device *dev, struct sk_buff *skb)
-{
-	if (ATH10K_SKB_CB(skb)->is_mapped)
-		return -EINVAL;
-
-	ATH10K_SKB_CB(skb)->paddr = dma_map_single(dev, skb->data, skb->len,
-						   DMA_TO_DEVICE);
-
-	if (unlikely(dma_mapping_error(dev, ATH10K_SKB_CB(skb)->paddr)))
-		return -EIO;
-
-	ATH10K_SKB_CB(skb)->is_mapped = true;
-	return 0;
-}
-
-static inline int ath10k_skb_unmap(struct device *dev, struct sk_buff *skb)
-{
-	if (!ATH10K_SKB_CB(skb)->is_mapped)
-		return -EINVAL;
-
-	dma_unmap_single(dev, ATH10K_SKB_CB(skb)->paddr, skb->len,
-			 DMA_TO_DEVICE);
-	ATH10K_SKB_CB(skb)->is_mapped = false;
-	return 0;
-}
-
 static inline u32 host_interest_item_address(u32 item_offset)
 {
 	return QCA988X_HOST_INTEREST_ADDRESS + item_offset;
@@ -288,6 +259,7 @@ struct ath10k_vif {
 
 	u8 fixed_rate;
 	u8 fixed_nss;
+	u8 force_sgi;
 };
 
 struct ath10k_vif_iter {

drivers/net/wireless/ath/ath10k/hif.h

@@ -21,6 +21,14 @@
 #include <linux/kernel.h>
 #include "core.h"
 
+struct ath10k_hif_sg_item {
+	u16 transfer_id;
+	void *transfer_context; /* NULL = tx completion callback not called */
+	void *vaddr; /* for debugging mostly */
+	u32 paddr;
+	u16 len;
+};
+
 struct ath10k_hif_cb {
 	int (*tx_completion)(struct ath10k *ar,
 			     struct sk_buff *wbuf,
@@ -31,11 +39,9 @@ struct ath10k_hif_cb {
 };
 
 struct ath10k_hif_ops {
-	/* Send the head of a buffer to HIF for transmission to the target. */
-	int (*send_head)(struct ath10k *ar, u8 pipe_id,
-			 unsigned int transfer_id,
-			 unsigned int nbytes,
-			 struct sk_buff *buf);
+	/* send a scatter-gather list to the target */
+	int (*tx_sg)(struct ath10k *ar, u8 pipe_id,
+		     struct ath10k_hif_sg_item *items, int n_items);
 
 	/*
 	 * API to handle HIF-specific BMI message exchanges, this API is
@@ -86,12 +92,11 @@ struct ath10k_hif_ops {
 };
 
 
-static inline int ath10k_hif_send_head(struct ath10k *ar, u8 pipe_id,
-				       unsigned int transfer_id,
-				       unsigned int nbytes,
-				       struct sk_buff *buf)
+static inline int ath10k_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
+				   struct ath10k_hif_sg_item *items,
+				   int n_items)
 {
-	return ar->hif.ops->send_head(ar, pipe_id, transfer_id, nbytes, buf);
+	return ar->hif.ops->tx_sg(ar, pipe_id, items, n_items);
 }
 
 static inline int ath10k_hif_exchange_bmi_msg(struct ath10k *ar,

drivers/net/wireless/ath/ath10k/htc.c

@@ -63,7 +63,9 @@ static struct sk_buff *ath10k_htc_build_tx_ctrl_skb(void *ar)
 static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
 					     struct sk_buff *skb)
 {
-	ath10k_skb_unmap(htc->ar->dev, skb);
+	struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
+
+	dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
 	skb_pull(skb, sizeof(struct ath10k_htc_hdr));
 }
 
@@ -122,6 +124,9 @@ int ath10k_htc_send(struct ath10k_htc *htc,
 		    struct sk_buff *skb)
 {
 	struct ath10k_htc_ep *ep = &htc->endpoint[eid];
+	struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
+	struct ath10k_hif_sg_item sg_item;
+	struct device *dev = htc->ar->dev;
 	int credits = 0;
 	int ret;
 
@@ -157,19 +162,25 @@ int ath10k_htc_send(struct ath10k_htc *htc,
 
 	ath10k_htc_prepare_tx_skb(ep, skb);
 
-	ret = ath10k_skb_map(htc->ar->dev, skb);
+	skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
+	ret = dma_mapping_error(dev, skb_cb->paddr);
 	if (ret)
 		goto err_credits;
 
-	ret = ath10k_hif_send_head(htc->ar, ep->ul_pipe_id, ep->eid,
-				   skb->len, skb);
+	sg_item.transfer_id = ep->eid;
+	sg_item.transfer_context = skb;
+	sg_item.vaddr = skb->data;
+	sg_item.paddr = skb_cb->paddr;
+	sg_item.len = skb->len;
+
+	ret = ath10k_hif_tx_sg(htc->ar, ep->ul_pipe_id, &sg_item, 1);
 	if (ret)
 		goto err_unmap;
 
 	return 0;
 
 err_unmap:
-	ath10k_skb_unmap(htc->ar->dev, skb);
+	dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
 err_credits:
 	if (ep->tx_credit_flow_enabled) {
 		spin_lock_bh(&htc->tx_lock);
@@ -191,10 +202,8 @@ static int ath10k_htc_tx_completion_handler(struct ath10k *ar,
 	struct ath10k_htc *htc = &ar->htc;
 	struct ath10k_htc_ep *ep = &htc->endpoint[eid];
 
-	if (!skb) {
-		ath10k_warn("invalid sk_buff completion - NULL pointer. firmware crashed?\n");
+	if (WARN_ON_ONCE(!skb))
 		return 0;
-	}
 
 	ath10k_htc_notify_tx_completion(ep, skb);
 	/* the skb now belongs to the completion handler */