Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next

Johan Hedberg says:

====================
pull request: bluetooth-next 2016-01-08

Here's one more bluetooth-next pull request for the 4.5 kernel:

 - Support for CRC check and promiscuous mode for CC2520
 - Fixes to btmrvl driver
 - New ACPI IDs for hci_bcm driver
 - Limited Discovery support for the Bluetooth mgmt interface
 - Minor other cleanups here and there

Please let me know if there are any issues pulling. Thanks.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

14 files changed, 244 insertions, 69 deletions

diff --git a/drivers/bluetooth/btmrvl_drv.h b/drivers/bluetooth/btmrvl_drv.h
index 27a9aac25583..05904732e6f1 100644
--- a/drivers/bluetooth/btmrvl_drv.h
+++ b/drivers/bluetooth/btmrvl_drv.h
@@ -89,6 +89,7 @@ struct btmrvl_adapter {
 	wait_queue_head_t event_hs_wait_q;
 	u8 cmd_complete;
 	bool is_suspended;
+	bool is_suspending;
 };
 
 struct btmrvl_private {
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index f2b38c880b11..f25a825a693f 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -436,6 +436,11 @@ static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 
 	BT_DBG("type=%d, len=%d", hci_skb_pkt_type(skb), skb->len);
 
+	if (priv->adapter->is_suspending || priv->adapter->is_suspended) {
+		BT_ERR("%s: Device is suspending or suspended", __func__);
+		return -EBUSY;
+	}
+
 	switch (hci_skb_pkt_type(skb)) {
 	case HCI_COMMAND_PKT:
 		hdev->stat.cmd_tx++;
@@ -452,7 +457,8 @@ static int btmrvl_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 
 	skb_queue_tail(&priv->adapter->tx_queue, skb);
 
-	wake_up_interruptible(&priv->main_thread.wait_q);
+	if (!priv->adapter->is_suspended)
+		wake_up_interruptible(&priv->main_thread.wait_q);
 
 	return 0;
 }
@@ -543,7 +549,7 @@ static int btmrvl_setup(struct hci_dev *hdev)
 	if (ret)
 		return ret;
 
-	priv->btmrvl_dev.gpio_gap = 0xffff;
+	priv->btmrvl_dev.gpio_gap = 0xfffe;
 
 	btmrvl_check_device_tree(priv);
 
@@ -643,7 +649,8 @@ static int btmrvl_service_main_thread(void *data)
 		if (adapter->ps_state == PS_SLEEP)
 			continue;
 
-		if (!priv->btmrvl_dev.tx_dnld_rdy)
+		if (!priv->btmrvl_dev.tx_dnld_rdy ||
+		    priv->adapter->is_suspended)
 			continue;
 
 		skb = skb_dequeue(&adapter->tx_queue);
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index d3a4acdf98c9..6ed8acfcfa9c 100644
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -1112,7 +1112,8 @@ static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card)
 	 */
 	if (btmrvl_sdio_verify_fw_download(card, pollnum)) {
 		BT_ERR("FW failed to be active in time!");
-		return -ETIMEDOUT;
+		ret = -ETIMEDOUT;
+		goto done;
 	}
 
 	sdio_release_host(card->func);
@@ -1544,10 +1545,10 @@ static int btmrvl_sdio_suspend(struct device *dev)
 	}
 
 	priv = card->priv;
+	priv->adapter->is_suspending = true;
 	hcidev = priv->btmrvl_dev.hcidev;
 	BT_DBG("%s: SDIO suspend", hcidev->name);
 	hci_suspend_dev(hcidev);
-	skb_queue_purge(&priv->adapter->tx_queue);
 
 	if (priv->adapter->hs_state != HS_ACTIVATED) {
 		if (btmrvl_enable_hs(priv)) {
@@ -1556,6 +1557,7 @@ static int btmrvl_sdio_suspend(struct device *dev)
 		}
 	}
 
+	priv->adapter->is_suspending = false;
 	priv->adapter->is_suspended = true;
 
 	/* We will keep the power when hs enabled successfully */
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index 5c7c696c5838..5f3de181e744 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -814,9 +814,16 @@ static const struct hci_uart_proto bcm_proto = {
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id bcm_acpi_match[] = {
+	{ "BCM2E1A", 0 },
 	{ "BCM2E39", 0 },
+	{ "BCM2E3A", 0 },
+	{ "BCM2E3D", 0 },
+	{ "BCM2E3F", 0 },
+	{ "BCM2E40", 0 },
+	{ "BCM2E64", 0 },
 	{ "BCM2E65", 0 },
 	{ "BCM2E67", 0 },
+	{ "BCM2E7B", 0 },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
diff --git a/drivers/net/ieee802154/cc2520.c b/drivers/net/ieee802154/cc2520.c
index e65b60591317..d50add705a79 100644
--- a/drivers/net/ieee802154/cc2520.c
+++ b/drivers/net/ieee802154/cc2520.c
@@ -21,6 +21,8 @@
 #include <linux/skbuff.h>
 #include <linux/of_gpio.h>
 #include <linux/ieee802154.h>
+#include <linux/crc-ccitt.h>
+#include <asm/unaligned.h>
 
 #include <net/mac802154.h>
 #include <net/cfg802154.h>
@@ -189,6 +191,18 @@
 #define	CC2520_RXFIFOCNT		0x3E
 #define	CC2520_TXFIFOCNT		0x3F
 
+/* CC2520_FRMFILT0 */
+#define FRMFILT0_FRAME_FILTER_EN	BIT(0)
+#define FRMFILT0_PAN_COORDINATOR	BIT(1)
+
+/* CC2520_FRMCTRL0 */
+#define FRMCTRL0_AUTOACK		BIT(5)
+#define FRMCTRL0_AUTOCRC		BIT(6)
+
+/* CC2520_FRMCTRL1 */
+#define FRMCTRL1_SET_RXENMASK_ON_TX	BIT(0)
+#define FRMCTRL1_IGNORE_TX_UNDERF	BIT(1)
+
 /* Driver private information */
 struct cc2520_private {
 	struct spi_device *spi;		/* SPI device structure */
@@ -201,6 +215,7 @@ struct cc2520_private {
 	struct work_struct fifop_irqwork;/* Workqueue for FIFOP */
 	spinlock_t lock;		/* Lock for is_tx*/
 	struct completion tx_complete;	/* Work completion for Tx */
+	bool promiscuous;               /* Flag for promiscuous mode */
 };
 
 /* Generic Functions */
@@ -367,14 +382,14 @@ cc2520_read_register(struct cc2520_private *priv, u8 reg, u8 *data)
 }
 
 static int
-cc2520_write_txfifo(struct cc2520_private *priv, u8 *data, u8 len)
+cc2520_write_txfifo(struct cc2520_private *priv, u8 pkt_len, u8 *data, u8 len)
 {
 	int status;
 
 	/* length byte must include FCS even
 	 * if it is calculated in the hardware
 	 */
-	int len_byte = len + 2;
+	int len_byte = pkt_len;
 
 	struct spi_message msg;
 
@@ -414,7 +429,7 @@ cc2520_write_txfifo(struct cc2520_private *priv, u8 *data, u8 len)
 }
 
 static int
-cc2520_read_rxfifo(struct cc2520_private *priv, u8 *data, u8 len, u8 *lqi)
+cc2520_read_rxfifo(struct cc2520_private *priv, u8 *data, u8 len)
 {
 	int status;
 	struct spi_message msg;
@@ -470,12 +485,25 @@ cc2520_tx(struct ieee802154_hw *hw, struct sk_buff *skb)
 	unsigned long flags;
 	int rc;
 	u8 status = 0;
+	u8 pkt_len;
+
+	/* In promiscuous mode we disable AUTOCRC so we can get the raw CRC
+	 * values on RX. This means we need to manually add the CRC on TX.
+	 */
+	if (priv->promiscuous) {
+		u16 crc = crc_ccitt(0, skb->data, skb->len);
+
+		put_unaligned_le16(crc, skb_put(skb, 2));
+		pkt_len = skb->len;
+	} else {
+		pkt_len = skb->len + 2;
+	}
 
 	rc = cc2520_cmd_strobe(priv, CC2520_CMD_SFLUSHTX);
 	if (rc)
 		goto err_tx;
 
-	rc = cc2520_write_txfifo(priv, skb->data, skb->len);
+	rc = cc2520_write_txfifo(priv, pkt_len, skb->data, skb->len);
 	if (rc)
 		goto err_tx;
 
@@ -518,22 +546,62 @@ static int cc2520_rx(struct cc2520_private *priv)
 	u8 len = 0, lqi = 0, bytes = 1;
 	struct sk_buff *skb;
 
-	cc2520_read_rxfifo(priv, &len, bytes, &lqi);
+	/* Read single length byte from the radio. */
+	cc2520_read_rxfifo(priv, &len, bytes);
 
-	if (len < 2 || len > IEEE802154_MTU)
-		return -EINVAL;
+	if (!ieee802154_is_valid_psdu_len(len)) {
+		/* Corrupted frame received, clear frame buffer by
+		 * reading entire buffer.
+		 */
+		dev_dbg(&priv->spi->dev, "corrupted frame received\n");
+		len = IEEE802154_MTU;
+	}
 
 	skb = dev_alloc_skb(len);
 	if (!skb)
 		return -ENOMEM;
 
-	if (cc2520_read_rxfifo(priv, skb_put(skb, len), len, &lqi)) {
+	if (cc2520_read_rxfifo(priv, skb_put(skb, len), len)) {
 		dev_dbg(&priv->spi->dev, "frame reception failed\n");
 		kfree_skb(skb);
 		return -EINVAL;
 	}
 
-	skb_trim(skb, skb->len - 2);
+	/* In promiscuous mode, we configure the radio to include the
+	 * CRC (AUTOCRC==0) and we pass on the packet unconditionally. If not
+	 * in promiscuous mode, we check the CRC here, but leave the
+	 * RSSI/LQI/CRC_OK bytes as they will get removed in the mac layer.
+	 */
+	if (!priv->promiscuous) {
+		bool crc_ok;
+
+		/* Check if the CRC is valid. With AUTOCRC set, the most
+		 * significant bit of the last byte returned from the CC2520
+		 * is CRC_OK flag. See section 20.3.4 of the datasheet.
+		 */
+		crc_ok = skb->data[len - 1] & BIT(7);
+
+		/* If we failed CRC drop the packet in the driver layer. */
+		if (!crc_ok) {
+			dev_dbg(&priv->spi->dev, "CRC check failed\n");
+			kfree_skb(skb);
+			return -EINVAL;
+		}
+
+		/* To calculate LQI, the lower 7 bits of the last byte (the
+		 * correlation value provided by the radio) must be scaled to
+		 * the range 0-255. According to section 20.6, the correlation
+		 * value ranges from 50-110. Ideally this would be calibrated
+		 * per hardware design, but we use roughly the datasheet values
+		 * to get close enough while avoiding floating point.
+		 */
+		lqi = skb->data[len - 1] & 0x7f;
+		if (lqi < 50)
+			lqi = 50;
+		else if (lqi > 113)
+			lqi = 113;
+		lqi = (lqi - 50) * 4;
+	}
 
 	ieee802154_rx_irqsafe(priv->hw, skb, lqi);
 
@@ -619,14 +687,19 @@ cc2520_filter(struct ieee802154_hw *hw,
 	}
 
 	if (changed & IEEE802154_AFILT_PANC_CHANGED) {
+		u8 frmfilt0;
+
 		dev_vdbg(&priv->spi->dev,
 			 "cc2520_filter called for panc change\n");
+
+		cc2520_read_register(priv, CC2520_FRMFILT0, &frmfilt0);
+
 		if (filt->pan_coord)
-			ret = cc2520_write_register(priv, CC2520_FRMFILT0,
-						    0x02);
+			frmfilt0 |= FRMFILT0_PAN_COORDINATOR;
 		else
-			ret = cc2520_write_register(priv, CC2520_FRMFILT0,
-						    0x00);
+			frmfilt0 &= ~FRMFILT0_PAN_COORDINATOR;
+
+		ret = cc2520_write_register(priv, CC2520_FRMFILT0, frmfilt0);
 	}
 
 	return ret;
@@ -723,6 +796,30 @@ cc2520_set_txpower(struct ieee802154_hw *hw, s32 mbm)
 	return cc2520_cc2591_set_tx_power(priv, mbm);
 }
 
+static int
+cc2520_set_promiscuous_mode(struct ieee802154_hw *hw, bool on)
+{
+	struct cc2520_private *priv = hw->priv;
+	u8 frmfilt0;
+
+	dev_dbg(&priv->spi->dev, "%s : mode %d\n", __func__, on);
+
+	priv->promiscuous = on;
+
+	cc2520_read_register(priv, CC2520_FRMFILT0, &frmfilt0);
+
+	if (on) {
+		/* Disable automatic ACK, automatic CRC, and frame filtering. */
+		cc2520_write_register(priv, CC2520_FRMCTRL0, 0);
+		frmfilt0 &= ~FRMFILT0_FRAME_FILTER_EN;
+	} else {
+		cc2520_write_register(priv, CC2520_FRMCTRL0, FRMCTRL0_AUTOACK |
+							     FRMCTRL0_AUTOCRC);
+		frmfilt0 |= FRMFILT0_FRAME_FILTER_EN;
+	}
+	return cc2520_write_register(priv, CC2520_FRMFILT0, frmfilt0);
+}
+
 static const struct ieee802154_ops cc2520_ops = {
 	.owner = THIS_MODULE,
 	.start = cc2520_start,
@@ -732,6 +829,7 @@ static const struct ieee802154_ops cc2520_ops = {
 	.set_channel = cc2520_set_channel,
 	.set_hw_addr_filt = cc2520_filter,
 	.set_txpower = cc2520_set_txpower,
+	.set_promiscuous_mode = cc2520_set_promiscuous_mode,
 };
 
 static int cc2520_register(struct cc2520_private *priv)
@@ -749,7 +847,8 @@ static int cc2520_register(struct cc2520_private *priv)
 
 	/* We do support only 2.4 Ghz */
 	priv->hw->phy->supported.channels[0] = 0x7FFF800;
-	priv->hw->flags = IEEE802154_HW_OMIT_CKSUM | IEEE802154_HW_AFILT;
+	priv->hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
+			  IEEE802154_HW_PROMISCUOUS;
 
 	priv->hw->phy->flags = WPAN_PHY_FLAG_TXPOWER;
 
@@ -919,6 +1018,11 @@ static int cc2520_hw_init(struct cc2520_private *priv)
 	}
 
 	/* Registers default value: section 28.1 in Datasheet */
+
+	/* Set the CCA threshold to -50 dBm. This seems to have been copied
+	 * from the TinyOS CC2520 driver and is much higher than the -84 dBm
+	 * threshold suggested in the datasheet.
+	 */
 	ret = cc2520_write_register(priv, CC2520_CCACTRL0, 0x1A);
 	if (ret)
 		goto err_ret;
@@ -955,15 +1059,10 @@ static int cc2520_hw_init(struct cc2520_private *priv)
 	if (ret)
 		goto err_ret;
 
-	ret = cc2520_write_register(priv, CC2520_FRMCTRL0, 0x60);
-	if (ret)
-		goto err_ret;
-
-	ret = cc2520_write_register(priv, CC2520_FRMCTRL1, 0x03);
-	if (ret)
-		goto err_ret;
-
-	ret = cc2520_write_register(priv, CC2520_FRMFILT0, 0x00);
+	/* Configure registers correctly for this driver. */
+	ret = cc2520_write_register(priv, CC2520_FRMCTRL1,
+				    FRMCTRL1_SET_RXENMASK_ON_TX |
+				    FRMCTRL1_IGNORE_TX_UNDERF);
 	if (ret)
 		goto err_ret;
 
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index c95e0326c41a..d4f82edb5cff 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -77,6 +77,7 @@ struct discovery_state {
 	u8			last_adv_data_len;
 	bool			report_invalid_rssi;
 	bool			result_filtering;
+	bool			limited;
 	s8			rssi;
 	u16			uuid_count;
 	u8			(*uuids)[16];
@@ -1283,31 +1284,41 @@ static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
 	mutex_unlock(&hci_cb_list_lock);
 }
 
-static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
+static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
+				 size_t *data_len)
 {
 	size_t parsed = 0;
 
-	if (data_len < 2)
-		return false;
+	if (eir_len < 2)
+		return NULL;
 
-	while (parsed < data_len - 1) {
-		u8 field_len = data[0];
+	while (parsed < eir_len - 1) {
+		u8 field_len = eir[0];
 
 		if (field_len == 0)
 			break;
 
 		parsed += field_len + 1;
 
-		if (parsed > data_len)
+		if (parsed > eir_len)
 			break;
 
-		if (data[1] == type)
-			return true;
+		if (eir[1] != type) {
+			eir += field_len + 1;
+			continue;
+		}
+
+		/* Zero length data */
+		if (field_len == 1)
+			return NULL;
 
-		data += field_len + 1;
+		if (data_len)
+			*data_len = field_len - 1;
+
+		return &eir[2];
 	}
 
-	return false;
+	return NULL;
 }
 
 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index af17774c9416..ea73e0826aa7 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -584,6 +584,8 @@ struct mgmt_rp_get_adv_size_info {
 	__u8	max_scan_rsp_len;
 } __packed;
 
+#define MGMT_OP_START_LIMITED_DISCOVERY	0x0041
+
 #define MGMT_EV_CMD_COMPLETE		0x0001
 struct mgmt_ev_cmd_complete {
 	__le16	opcode;
diff --git a/include/net/ieee802154_netdev.h b/include/net/ieee802154_netdev.h
index a62a051a3a2f..c4b31601cd53 100644
--- a/include/net/ieee802154_netdev.h
+++ b/include/net/ieee802154_netdev.h
@@ -337,7 +337,7 @@ struct ieee802154_mlme_ops {
 	void (*get_mac_params)(struct net_device *dev,
 			       struct ieee802154_mac_params *params);
 
-	struct ieee802154_llsec_ops *llsec;
+	const struct ieee802154_llsec_ops *llsec;
 };
 
 static inline struct ieee802154_mlme_ops *
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 7554da5b7a8f..c162af5d16bf 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3833,9 +3833,9 @@ static void hci_extended_inquiry_result_evt(struct hci_dev *hdev,
 		data.ssp_mode		= 0x01;
 
 		if (hci_dev_test_flag(hdev, HCI_MGMT))
-			name_known = eir_has_data_type(info->data,
-						       sizeof(info->data),
-						       EIR_NAME_COMPLETE);
+			name_known = eir_get_data(info->data,
+						  sizeof(info->data),
+						  EIR_NAME_COMPLETE, NULL);
 		else
 			name_known = true;
 
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 9997c31ef987..41b5f3813f02 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -1737,8 +1737,8 @@ static int le_scan_disable(struct hci_request *req, unsigned long opt)
 static int bredr_inquiry(struct hci_request *req, unsigned long opt)
 {
 	u8 length = opt;
-	/* General inquiry access code (GIAC) */
-	u8 lap[3] = { 0x33, 0x8b, 0x9e };
+	const u8 giac[3] = { 0x33, 0x8b, 0x9e };
+	const u8 liac[3] = { 0x00, 0x8b, 0x9e };
 	struct hci_cp_inquiry cp;
 
 	BT_DBG("%s", req->hdev->name);
@@ -1748,7 +1748,12 @@ static int bredr_inquiry(struct hci_request *req, unsigned long opt)
 	hci_dev_unlock(req->hdev);
 
 	memset(&cp, 0, sizeof(cp));
-	memcpy(&cp.lap, lap, sizeof(cp.lap));
+
+	if (req->hdev->discovery.limited)
+		memcpy(&cp.lap, liac, sizeof(cp.lap));
+	else
+		memcpy(&cp.lap, giac, sizeof(cp.lap));
+
 	cp.length = length;
 
 	hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 41f579ba447b..1298d723c0e0 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -25,9 +25,8 @@
 /* Bluetooth HCI sockets. */
 
 #include <linux/export.h>
+#include <linux/utsname.h>
 #include <asm/unaligned.h>
-#include <generated/compile.h>
-#include <generated/utsrelease.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -385,17 +384,26 @@ static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
 	return skb;
 }
 
-static void send_monitor_note(struct sock *sk, const char *text)
+static void __printf(2, 3)
+send_monitor_note(struct sock *sk, const char *fmt, ...)
 {
-	size_t len = strlen(text);
+	size_t len;
 	struct hci_mon_hdr *hdr;
 	struct sk_buff *skb;
+	va_list args;
+
+	va_start(args, fmt);
+	len = vsnprintf(NULL, 0, fmt, args);
+	va_end(args);
 
 	skb = bt_skb_alloc(len + 1, GFP_ATOMIC);
 	if (!skb)
 		return;
 
-	strcpy(skb_put(skb, len + 1), text);
+	va_start(args, fmt);
+	vsprintf(skb_put(skb, len), fmt, args);
+	*skb_put(skb, 1) = 0;
+	va_end(args);
 
 	__net_timestamp(skb);
 
@@ -897,10 +905,11 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
 		 */
 		hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
 
-		send_monitor_note(sk, "Linux version " UTS_RELEASE
-				      " (" UTS_MACHINE ")");
-		send_monitor_note(sk, "Bluetooth subsystem version "
-				      BT_SUBSYS_VERSION);
+		send_monitor_note(sk, "Linux version %s (%s)",
+				  init_utsname()->release,
+				  init_utsname()->machine);
+		send_monitor_note(sk, "Bluetooth subsystem version %s",
+				  BT_SUBSYS_VERSION);
 		send_monitor_replay(sk);
 
 		atomic_inc(&monitor_promisc);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 621f6fdd0dd1..5a5089cb6570 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -103,6 +103,7 @@ static const u16 mgmt_commands[] = {
 	MGMT_OP_ADD_ADVERTISING,
 	MGMT_OP_REMOVE_ADVERTISING,
 	MGMT_OP_GET_ADV_SIZE_INFO,
+	MGMT_OP_START_LIMITED_DISCOVERY,
 };
 
 static const u16 mgmt_events[] = {
@@ -3283,6 +3284,9 @@ void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status)
 	if (!cmd)
 		cmd = pending_find(MGMT_OP_START_SERVICE_DISCOVERY, hdev);
 
+	if (!cmd)
+		cmd = pending_find(MGMT_OP_START_LIMITED_DISCOVERY, hdev);
+
 	if (cmd) {
 		cmd->cmd_complete(cmd, mgmt_status(status));
 		mgmt_pending_remove(cmd);
@@ -3318,8 +3322,8 @@ static bool discovery_type_is_valid(struct hci_dev *hdev, uint8_t type,
 	return true;
 }
 
-static int start_discovery(struct sock *sk, struct hci_dev *hdev,
-			   void *data, u16 len)
+static int start_discovery_internal(struct sock *sk, struct hci_dev *hdev,
+				    u16 op, void *data, u16 len)
 {
 	struct mgmt_cp_start_discovery *cp = data;
 	struct mgmt_pending_cmd *cmd;
@@ -3331,7 +3335,7 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
 	hci_dev_lock(hdev);
 
 	if (!hdev_is_powered(hdev)) {
-		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_START_DISCOVERY,
+		err = mgmt_cmd_complete(sk, hdev->id, op,
 					MGMT_STATUS_NOT_POWERED,
 					&cp->type, sizeof(cp->type));
 		goto failed;
@@ -3339,15 +3343,14 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
 
 	if (hdev->discovery.state != DISCOVERY_STOPPED ||
 	    hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) {
-		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_START_DISCOVERY,
-					MGMT_STATUS_BUSY, &cp->type,
-					sizeof(cp->type));
+		err = mgmt_cmd_complete(sk, hdev->id, op, MGMT_STATUS_BUSY,
+					&cp->type, sizeof(cp->type));
 		goto failed;
 	}
 
 	if (!discovery_type_is_valid(hdev, cp->type, &status)) {
-		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_START_DISCOVERY,
-					status, &cp->type, sizeof(cp->type));
+		err = mgmt_cmd_complete(sk, hdev->id, op, status,
+					&cp->type, sizeof(cp->type));
 		goto failed;
 	}
 
@@ -3358,8 +3361,12 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
 
 	hdev->discovery.type = cp->type;
 	hdev->discovery.report_invalid_rssi = false;
+	if (op == MGMT_OP_START_LIMITED_DISCOVERY)
+		hdev->discovery.limited = true;
+	else
+		hdev->discovery.limited = false;
 
-	cmd = mgmt_pending_add(sk, MGMT_OP_START_DISCOVERY, hdev, data, len);
+	cmd = mgmt_pending_add(sk, op, hdev, data, len);
 	if (!cmd) {
 		err = -ENOMEM;
 		goto failed;
@@ -3376,6 +3383,21 @@ failed:
 	return err;
 }
 
+static int start_discovery(struct sock *sk, struct hci_dev *hdev,
+			   void *data, u16 len)
+{
+	return start_discovery_internal(sk, hdev, MGMT_OP_START_DISCOVERY,
+					data, len);
+}
+
+static int start_limited_discovery(struct sock *sk, struct hci_dev *hdev,
+				   void *data, u16 len)
+{
+	return start_discovery_internal(sk, hdev,
+					MGMT_OP_START_LIMITED_DISCOVERY,
+					data, len);
+}
+
 static int service_discovery_cmd_complete(struct mgmt_pending_cmd *cmd,
 					  u8 status)
 {
@@ -6313,6 +6335,7 @@ static const struct hci_mgmt_handler mgmt_handlers[] = {
 						HCI_MGMT_VAR_LEN },
 	{ remove_advertising,	   MGMT_REMOVE_ADVERTISING_SIZE },
 	{ get_adv_size_info,       MGMT_GET_ADV_SIZE_INFO_SIZE },
+	{ start_limited_discovery, MGMT_START_DISCOVERY_SIZE },
 };
 
 void mgmt_index_added(struct hci_dev *hdev)
@@ -7237,6 +7260,18 @@ void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 			return;
 	}
 
+	if (hdev->discovery.limited) {
+		/* Check for limited discoverable bit */
+		if (dev_class) {
+			if (!(dev_class[1] & 0x20))
+				return;
+		} else {
+			u8 *flags = eir_get_data(eir, eir_len, EIR_FLAGS, NULL);
+			if (!flags || !(flags[0] & LE_AD_LIMITED))
+				return;
+		}
+	}
+
 	/* Make sure that the buffer is big enough. The 5 extra bytes
 	 * are for the potential CoD field.
 	 */
@@ -7266,7 +7301,8 @@ void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 		/* Copy EIR or advertising data into event */
 		memcpy(ev->eir, eir, eir_len);
 
-	if (dev_class && !eir_has_data_type(ev->eir, eir_len, EIR_CLASS_OF_DEV))
+	if (dev_class && !eir_get_data(ev->eir, eir_len, EIR_CLASS_OF_DEV,
+				       NULL))
 		eir_len = eir_append_data(ev->eir, eir_len, EIR_CLASS_OF_DEV,
 					  dev_class, 3);
 
diff --git a/net/mac802154/mac_cmd.c b/net/mac802154/mac_cmd.c
index 8606da459ff3..3db16346cab3 100644
--- a/net/mac802154/mac_cmd.c
+++ b/net/mac802154/mac_cmd.c
@@ -126,7 +126,7 @@ static void mac802154_get_mac_params(struct net_device *dev,
 	params->lbt = wpan_dev->lbt;
 }
 
-static struct ieee802154_llsec_ops mac802154_llsec_ops = {
+static const struct ieee802154_llsec_ops mac802154_llsec_ops = {
 	.get_params = mac802154_get_params,
 	.set_params = mac802154_set_params,
 	.add_key = mac802154_add_key,
diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
index 93127220cb54..4b1e3f35f06c 100644
--- a/net/rfkill/rfkill-gpio.c
+++ b/net/rfkill/rfkill-gpio.c
@@ -163,10 +163,6 @@ static int rfkill_gpio_remove(struct platform_device *pdev)
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id rfkill_acpi_match[] = {
-	{ "BCM2E1A", RFKILL_TYPE_BLUETOOTH },
-	{ "BCM2E3D", RFKILL_TYPE_BLUETOOTH },
-	{ "BCM2E40", RFKILL_TYPE_BLUETOOTH },
-	{ "BCM2E64", RFKILL_TYPE_BLUETOOTH },
 	{ "BCM4752", RFKILL_TYPE_GPS },
 	{ "LNV4752", RFKILL_TYPE_GPS },
 	{ },