Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [NET]: rfkill: add support for input key to control wireless radio
  [NET] net/core: Fix error handling
  [TG3]: Update version and reldate.
  [TG3]: Eliminate spurious interrupts.
  [TG3]: Add ASPM workaround.
  [Bluetooth] Correct SCO buffer for another Broadcom based dongle
  [Bluetooth] Add support for Targus ACB10US USB dongle
  [Bluetooth] Disconnect L2CAP connection after last RFCOMM DLC
  [Bluetooth] Check that device is in rfcomm_dev_list before deleting
  [Bluetooth] Use in-kernel sockets API
  [Bluetooth] Attach host adapters to the Bluetooth bus
  [Bluetooth] Fix L2CAP and HCI setsockopt() information leaks

drivers/bluetooth/hci_usb.c

@@ -114,10 +114,16 @@ static struct usb_device_id blacklist_ids[] = {
 	{ USB_DEVICE(0x0a5c, 0x200a), .driver_info = HCI_RESET | HCI_WRONG_SCO_MTU },
 	{ USB_DEVICE(0x0a5c, 0x2009), .driver_info = HCI_BCM92035 },
 
+	/* Broadcom BCM2045 */
+	{ USB_DEVICE(0x0a5c, 0x2101), .driver_info = HCI_WRONG_SCO_MTU },
+
 	/* IBM/Lenovo ThinkPad with Broadcom chip */
 	{ USB_DEVICE(0x0a5c, 0x201e), .driver_info = HCI_WRONG_SCO_MTU },
 	{ USB_DEVICE(0x0a5c, 0x2110), .driver_info = HCI_WRONG_SCO_MTU },
 
+	/* Targus ACB10US */
+	{ USB_DEVICE(0x0a5c, 0x2100), .driver_info = HCI_RESET },
+
 	/* ANYCOM Bluetooth USB-200 and USB-250 */
 	{ USB_DEVICE(0x0a5c, 0x2111), .driver_info = HCI_RESET },
 

drivers/net/tg3.c

@@ -64,8 +64,8 @@
 
 #define DRV_MODULE_NAME		"tg3"
 #define PFX DRV_MODULE_NAME	": "
-#define DRV_MODULE_VERSION	"3.75"
-#define DRV_MODULE_RELDATE	"March 23, 2007"
+#define DRV_MODULE_VERSION	"3.76"
+#define DRV_MODULE_RELDATE	"May 5, 2007"
 
 #define TG3_DEF_MAC_MODE	0
 #define TG3_DEF_RX_MODE		0
@@ -3019,6 +3019,16 @@ static int tg3_setup_phy(struct tg3 *tp, int force_reset)
 		}
 	}
 
+	if (tp->tg3_flags & TG3_FLAG_ASPM_WORKAROUND) {
+		u32 val = tr32(PCIE_PWR_MGMT_THRESH);
+		if (!netif_carrier_ok(tp->dev))
+			val = (val & ~PCIE_PWR_MGMT_L1_THRESH_MSK) |
+			      tp->pwrmgmt_thresh;
+		else
+			val |= PCIE_PWR_MGMT_L1_THRESH_MSK;
+		tw32(PCIE_PWR_MGMT_THRESH, val);
+	}
+
 	return err;
 }
 
@@ -3580,8 +3590,12 @@ static irqreturn_t tg3_interrupt(int irq, void *dev_id)
 	 * Writing non-zero to intr-mbox-0 additional tells the
 	 * NIC to stop sending us irqs, engaging "in-intr-handler"
 	 * event coalescing.
+	 *
+	 * Flush the mailbox to de-assert the IRQ immediately to prevent
+	 * spurious interrupts.  The flush impacts performance but
+	 * excessive spurious interrupts can be worse in some cases.
 	 */
-	tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
+	tw32_mailbox_f(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
 	if (tg3_irq_sync(tp))
 		goto out;
 	sblk->status &= ~SD_STATUS_UPDATED;
@@ -3625,8 +3639,12 @@ static irqreturn_t tg3_interrupt_tagged(int irq, void *dev_id)
 	 * writing non-zero to intr-mbox-0 additional tells the
 	 * NIC to stop sending us irqs, engaging "in-intr-handler"
 	 * event coalescing.
+	 *
+	 * Flush the mailbox to de-assert the IRQ immediately to prevent
+	 * spurious interrupts.  The flush impacts performance but
+	 * excessive spurious interrupts can be worse in some cases.
 	 */
-	tw32_mailbox(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
+	tw32_mailbox_f(MAILBOX_INTERRUPT_0 + TG3_64BIT_REG_LOW, 0x00000001);
 	if (tg3_irq_sync(tp))
 		goto out;
 	if (netif_rx_schedule_prep(dev)) {
@@ -10004,6 +10022,8 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp)
 			tp->tg3_flags &= ~TG3_FLAG_EEPROM_WRITE_PROT;
 			tp->tg3_flags2 |= TG3_FLG2_IS_NIC;
 		}
+		if (tr32(VCPU_CFGSHDW) & VCPU_CFGSHDW_ASPM_DBNC)
+			tp->tg3_flags |= TG3_FLAG_ASPM_WORKAROUND;
 		return;
 	}
 
@@ -10131,6 +10151,14 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp)
 		/* bootcode if bit 18 is set */
 		if (cfg2 & (1 << 18))
 			tp->tg3_flags2 |= TG3_FLG2_SERDES_PREEMPHASIS;
+
+		if (tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS) {
+			u32 cfg3;
+
+			tg3_read_mem(tp, NIC_SRAM_DATA_CFG_3, &cfg3);
+			if (cfg3 & NIC_SRAM_ASPM_DEBOUNCE)
+				tp->tg3_flags |= TG3_FLAG_ASPM_WORKAROUND;
+		}
 	}
 }
 
@@ -10998,6 +11026,10 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
 	 */
 	tp->tg3_flags &= ~TG3_FLAG_WOL_ENABLE;
 
+	if (tp->tg3_flags & TG3_FLAG_ASPM_WORKAROUND)
+		tp->pwrmgmt_thresh = tr32(PCIE_PWR_MGMT_THRESH) &
+				     PCIE_PWR_MGMT_L1_THRESH_MSK;
+
 	return err;
 }
 

drivers/net/tg3.h

@@ -1150,6 +1150,9 @@
 #define  VCPU_STATUS_INIT_DONE		 0x04000000
 #define  VCPU_STATUS_DRV_RESET		 0x08000000
 
+#define VCPU_CFGSHDW			0x00005104
+#define  VCPU_CFGSHDW_ASPM_DBNC		 0x00001000
+
 /* Mailboxes */
 #define GRCMBOX_BASE			0x00005600
 #define GRCMBOX_INTERRUPT_0		0x00005800 /* 64-bit */
@@ -1507,6 +1510,8 @@
 #define PCIE_TRANS_CFG_1SHOT_MSI	 0x20000000
 #define PCIE_TRANS_CFG_LOM		 0x00000020
 
+#define PCIE_PWR_MGMT_THRESH		0x00007d28
+#define PCIE_PWR_MGMT_L1_THRESH_MSK	 0x0000ff00
 
 #define TG3_EEPROM_MAGIC		0x669955aa
 #define TG3_EEPROM_MAGIC_FW		0xa5000000
@@ -1593,6 +1598,9 @@
 #define  SHASTA_EXT_LED_MAC		 0x00010000
 #define  SHASTA_EXT_LED_COMBO		 0x00018000
 
+#define NIC_SRAM_DATA_CFG_3		0x00000d3c
+#define  NIC_SRAM_ASPM_DEBOUNCE		 0x00000002
+
 #define NIC_SRAM_RX_MINI_BUFFER_DESC	0x00001000
 
 #define NIC_SRAM_DMA_DESC_POOL_BASE	0x00002000
@@ -2200,6 +2208,7 @@ struct tg3 {
 #define TG3_FLAG_USE_LINKCHG_REG	0x00000008
 #define TG3_FLAG_USE_MI_INTERRUPT	0x00000010
 #define TG3_FLAG_ENABLE_ASF		0x00000020
+#define TG3_FLAG_ASPM_WORKAROUND	0x00000040
 #define TG3_FLAG_POLL_SERDES		0x00000080
 #define TG3_FLAG_MBOX_WRITE_REORDER	0x00000100
 #define TG3_FLAG_PCIX_TARGET_HWBUG	0x00000200
@@ -2288,6 +2297,7 @@ struct tg3 {
 	u32				grc_local_ctrl;
 	u32				dma_rwctrl;
 	u32				coalesce_mode;
+	u32				pwrmgmt_thresh;
 
 	/* PCI block */
 	u16				pci_chip_rev_id;

include/linux/rfkill.h

+#ifndef __RFKILL_H
+#define __RFKILL_H
+
+/*
+ * Copyright (C) 2006 Ivo van Doorn
+ * Copyright (C) 2007 Dmitry Torokhov
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+
+/**
+ * enum rfkill_type - type of rfkill switch.
+ * RFKILL_TYPE_WLAN: switch is no a Wireless network devices.
+ * RFKILL_TYPE_BlUETOOTH: switch is on a bluetooth device.
+ * RFKILL_TYPE_IRDA: switch is on an infrared devices.
+ */
+enum rfkill_type {
+	RFKILL_TYPE_WLAN = 0,
+	RFKILL_TYPE_BLUETOOTH = 1,
+	RFKILL_TYPE_IRDA = 2,
+	RFKILL_TYPE_MAX = 3,
+};
+
+enum rfkill_state {
+	RFKILL_STATE_OFF	= 0,
+	RFKILL_STATE_ON		= 1,
+};
+
+/**
+ * struct rfkill - rfkill control structure.
+ * @name: Name of the switch.
+ * @type: Radio type which the button controls, the value stored
+ *	here should be a value from enum rfkill_type.
+ * @state: State of the switch (on/off).
+ * @user_claim: Set when the switch is controlled exlusively by userspace.
+ * @mutex: Guards switch state transitions
+ * @data: Pointer to the RF button drivers private data which will be
+ *	passed along when toggling radio state.
+ * @toggle_radio(): Mandatory handler to control state of the radio.
+ * @dev: Device structure integrating the switch into device tree.
+ * @node: Used to place switch into list of all switches known to the
+ *	the system.
+ *
+ * This structure represents a RF switch located on a network device.
+ */
+struct rfkill {
+	char *name;
+	enum rfkill_type type;
+
+	enum rfkill_state state;
+	bool user_claim;
+
+	struct mutex mutex;
+
+	void *data;
+	int (*toggle_radio)(void *data, enum rfkill_state state);
+
+	struct device dev;
+	struct list_head node;
+};
+#define to_rfkill(d)	container_of(d, struct rfkill, dev)
+
+struct rfkill *rfkill_allocate(struct device *parent, enum rfkill_type type);
+void rfkill_free(struct rfkill *rfkill);
+int rfkill_register(struct rfkill *rfkill);
+void rfkill_unregister(struct rfkill *rfkill);
+
+void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state);
+
+#endif /* RFKILL_H */

net/Kconfig

@@ -225,6 +225,8 @@ source "net/ieee80211/Kconfig"
 
 endmenu
 
+source "net/rfkill/Kconfig"
+
 endif   # if NET
 endmenu # Networking
 

net/Makefile

@@ -51,6 +51,7 @@ obj-$(CONFIG_IEEE80211)		+= ieee80211/
 obj-$(CONFIG_TIPC)		+= tipc/
 obj-$(CONFIG_NETLABEL)		+= netlabel/
 obj-$(CONFIG_IUCV)		+= iucv/
+obj-$(CONFIG_RFKILL)		+= rfkill/
 
 ifeq ($(CONFIG_NET),y)
 obj-$(CONFIG_SYSCTL)		+= sysctl_net.o

net/bluetooth/hci_sock.c

@@ -499,6 +499,15 @@ static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char
 		break;
 
 	case HCI_FILTER:
+		{
+			struct hci_filter *f = &hci_pi(sk)->filter;
+
+			uf.type_mask = f->type_mask;
+			uf.opcode    = f->opcode;
+			uf.event_mask[0] = *((u32 *) f->event_mask + 0);
+			uf.event_mask[1] = *((u32 *) f->event_mask + 1);
+		}
+
 		len = min_t(unsigned int, len, sizeof(uf));
 		if (copy_from_user(&uf, optval, len)) {
 			err = -EFAULT;

net/bluetooth/hci_sysfs.c

@@ -305,7 +305,7 @@ int hci_register_sysfs(struct hci_dev *hdev)
 
 	BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 
-	dev->class = bt_class;
+	dev->bus = &bt_bus;
 	dev->parent = hdev->parent;
 
 	strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
@@ -322,6 +322,10 @@ int hci_register_sysfs(struct hci_dev *hdev)
 		if (device_create_file(dev, bt_attrs[i]) < 0)
 			BT_ERR("Failed to create device attribute");
 
+	if (sysfs_create_link(&bt_class->subsys.kset.kobj,
+				&dev->kobj, kobject_name(&dev->kobj)) < 0)
+		BT_ERR("Failed to create class symlink");
+
 	return 0;
 }
 
@@ -329,6 +333,9 @@ void hci_unregister_sysfs(struct hci_dev *hdev)
 {
 	BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 
+	sysfs_remove_link(&bt_class->subsys.kset.kobj,
+					kobject_name(&hdev->dev.kobj));
+
 	device_del(&hdev->dev);
 }
 

net/bluetooth/l2cap.c

@@ -954,11 +954,17 @@ static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, ch
 
 	switch (optname) {
 	case L2CAP_OPTIONS:
+		opts.imtu     = l2cap_pi(sk)->imtu;
+		opts.omtu     = l2cap_pi(sk)->omtu;
+		opts.flush_to = l2cap_pi(sk)->flush_to;
+		opts.mode     = 0x00;
+
 		len = min_t(unsigned int, sizeof(opts), optlen);
 		if (copy_from_user((char *) &opts, optval, len)) {
 			err = -EFAULT;
 			break;
 		}
+
 		l2cap_pi(sk)->imtu  = opts.imtu;
 		l2cap_pi(sk)->omtu  = opts.omtu;
 		break;

net/bluetooth/rfcomm/core.c

@@ -622,7 +622,7 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst
 	bacpy(&addr.l2_bdaddr, src);
 	addr.l2_family = AF_BLUETOOTH;
 	addr.l2_psm    = 0;
-	*err = sock->ops->bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+	*err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
 	if (*err < 0)
 		goto failed;
 
@@ -643,7 +643,7 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst
 	bacpy(&addr.l2_bdaddr, dst);
 	addr.l2_family = AF_BLUETOOTH;
 	addr.l2_psm    = htobs(RFCOMM_PSM);
-	*err = sock->ops->connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK);
+	*err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK);
 	if (*err == 0 || *err == -EINPROGRESS)
 		return s;
 
@@ -1058,6 +1058,12 @@ static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
 		case BT_DISCONN:
 			d->state = BT_CLOSED;
 			__rfcomm_dlc_close(d, 0);
+
+			if (list_empty(&s->dlcs)) {
+				s->state = BT_DISCONN;
+				rfcomm_send_disc(s, 0);
+			}
+
 			break;
 		}
 	} else {
@@ -1067,6 +1073,10 @@ static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
 			s->state = BT_CONNECTED;
 			rfcomm_process_connect(s);
 			break;
+
+		case BT_DISCONN:
+			rfcomm_session_put(s);
+			break;
 		}
 	}
 	return 0;
@@ -1757,19 +1767,12 @@ static inline void rfcomm_accept_connection(struct rfcomm_session *s)
 
 	BT_DBG("session %p", s);
 
-	if (sock_create_lite(PF_BLUETOOTH, sock->type, BTPROTO_L2CAP, &nsock))
+	err = kernel_accept(sock, &nsock, O_NONBLOCK);
+	if (err < 0)
 		return;
 
-	nsock->ops  = sock->ops;
-
 	__module_get(nsock->ops->owner);
 
-	err = sock->ops->accept(sock, nsock, O_NONBLOCK);
-	if (err < 0) {
-		sock_release(nsock);
-		return;
-	}
-
 	/* Set our callbacks */
 	nsock->sk->sk_data_ready   = rfcomm_l2data_ready;
 	nsock->sk->sk_state_change = rfcomm_l2state_change;
@@ -1885,7 +1888,7 @@ static int rfcomm_add_listener(bdaddr_t *ba)
 	bacpy(&addr.l2_bdaddr, ba);
 	addr.l2_family = AF_BLUETOOTH;
 	addr.l2_psm    = htobs(RFCOMM_PSM);
-	err = sock->ops->bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+	err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
 	if (err < 0) {
 		BT_ERR("Bind failed %d", err);
 		goto failed;
@@ -1898,7 +1901,7 @@ static int rfcomm_add_listener(bdaddr_t *ba)
 	release_sock(sk);
 
 	/* Start listening on the socket */
-	err = sock->ops->listen(sock, 10);
+	err = kernel_listen(sock, 10);
 	if (err) {
 		BT_ERR("Listen failed %d", err);
 		goto failed;

net/bluetooth/rfcomm/tty.c

@@ -517,9 +517,10 @@ static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err)
 	if (dlc->state == BT_CLOSED) {
 		if (!dev->tty) {
 			if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) {
-				rfcomm_dev_hold(dev);
-				rfcomm_dev_del(dev);
+				if (rfcomm_dev_get(dev->id) == NULL)
+					return;
 
+				rfcomm_dev_del(dev);
 				/* We have to drop DLC lock here, otherwise
 				   rfcomm_dev_put() will dead lock if it's
 				   the last reference. */
@@ -974,8 +975,12 @@ static void rfcomm_tty_hangup(struct tty_struct *tty)
 
 	rfcomm_tty_flush_buffer(tty);
 
-	if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags))
+	if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) {
+		if (rfcomm_dev_get(dev->id) == NULL)
+			return;
 		rfcomm_dev_del(dev);
+		rfcomm_dev_put(dev);
+	}
 }
 
 static int rfcomm_tty_read_proc(char *buf, char **start, off_t offset, int len, int *eof, void *unused)

net/core/dev.c

@@ -2377,9 +2377,9 @@ static int __init dev_proc_init(void)
 out:
 	return rc;
 out_softnet:
-	proc_net_remove("softnet_stat");
-out_dev2:
 	proc_net_remove("ptype");
+out_dev2:
+	proc_net_remove("softnet_stat");
 out_dev:
 	proc_net_remove("dev");
 	goto out;

net/rfkill/Kconfig

+#
+# RF switch subsystem configuration
+#
+menuconfig RFKILL
+	tristate "RF switch subsystem support"
+	help
+	  Say Y here if you want to have control over RF switches
+	  found on many WiFi, Bluetooth and IRDA cards.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rfkill.
+
+config RFKILL_INPUT
+	tristate "Input layer to RF switch connector"
+	depends on RFKILL && INPUT
+	help
+	  Say Y here if you want kernel automatically toggle state
+	  of RF switches on and off when user presses appropriate
+	  button or a key on the keyboard. Without this module you
+	  need a some kind of userspace application to control
+	  state of the switches.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rfkill-input.

net/rfkill/Makefile

+#
+# Makefile for the RF switch subsystem.
+#
+
+obj-$(CONFIG_RFKILL)			+= rfkill.o
+obj-$(CONFIG_RFKILL_INPUT)		+= rfkill-input.o

net/rfkill/rfkill-input.c

+/*
+ * Input layer to RF Kill interface connector
+ *
+ * Copyright (c) 2007 Dmitry Torokhov
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/init.h>
+#include <linux/rfkill.h>
+
+MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
+MODULE_DESCRIPTION("Input layer to RF switch connector");
+MODULE_LICENSE("GPL");
+
+struct rfkill_task {
+	struct work_struct work;
+	enum rfkill_type type;
+	struct mutex mutex; /* ensures that task is serialized */
+	spinlock_t lock; /* for accessing last and desired state */
+	unsigned long last; /* last schedule */
+	enum rfkill_state desired_state; /* on/off */
+	enum rfkill_state current_state; /* on/off */
+};
+
+static void rfkill_task_handler(struct work_struct *work)
+{
+	struct rfkill_task *task = container_of(work, struct rfkill_task, work);
+	enum rfkill_state state;
+
+	mutex_lock(&task->mutex);
+
+	/*
+	 * Use temp variable to fetch desired state to keep it
+	 * consistent even if rfkill_schedule_toggle() runs in
+	 * another thread or interrupts us.
+	 */
+	state = task->desired_state;
+
+	if (state != task->current_state) {
+		rfkill_switch_all(task->type, state);
+		task->current_state = state;
+	}
+
+	mutex_unlock(&task->mutex);
+}
+
+static void rfkill_schedule_toggle(struct rfkill_task *task)
+{
+	unsigned int flags;
+
+	spin_lock_irqsave(&task->lock, flags);
+
+	if (time_after(jiffies, task->last + msecs_to_jiffies(200))) {
+		task->desired_state = !task->desired_state;
+		task->last = jiffies;
+		schedule_work(&task->work);
+	}
+
+	spin_unlock_irqrestore(&task->lock, flags);
+}
+
+#define DEFINE_RFKILL_TASK(n, t)			\
+	struct rfkill_task n = {			\
+		.work = __WORK_INITIALIZER(n.work,	\
+				rfkill_task_handler),	\
+		.type = t,				\
+		.mutex = __MUTEX_INITIALIZER(n.mutex),	\
+		.lock = __SPIN_LOCK_UNLOCKED(n.lock),	\
+		.desired_state = RFKILL_STATE_ON,	\
+		.current_state = RFKILL_STATE_ON,	\
+	}
+
+static DEFINE_RFKILL_TASK(rfkill_wlan, RFKILL_TYPE_WLAN);
+static DEFINE_RFKILL_TASK(rfkill_bt, RFKILL_TYPE_BLUETOOTH);
+
+static void rfkill_event(struct input_handle *handle, unsigned int type,
+		        unsigned int code, int down)
+{
+	if (type == EV_KEY && down == 1) {
+		switch (code) {
+		case KEY_WLAN:
+			rfkill_schedule_toggle(&rfkill_wlan);
+			break;
+		case KEY_BLUETOOTH:
+			rfkill_schedule_toggle(&rfkill_bt);
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+static int rfkill_connect(struct input_handler *handler, struct input_dev *dev,
+			  const struct input_device_id *id)
+{
+	struct input_handle *handle;
+	int error;
+
+	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
+	if (!handle)
+		return -ENOMEM;
+
+	handle->dev = dev;
+	handle->handler = handler;
+	handle->name = "rfkill";
+
+	error = input_register_handle(handle);
+	if (error)
+		goto err_free_handle;
+
+	error = input_open_device(handle);
+	if (error)
+		goto err_unregister_handle;
+
+	return 0;
+
+ err_unregister_handle:
+	input_unregister_handle(handle);
+ err_free_handle:
+	kfree(handle);
+	return error;
+}
+
+static void rfkill_disconnect(struct input_handle *handle)
+{
+	input_close_device(handle);
+	input_unregister_handle(handle);
+	kfree(handle);
+}
+
+static const struct input_device_id rfkill_ids[] = {
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT(EV_KEY) },
+		.keybit = { [LONG(KEY_WLAN)] = BIT(KEY_WLAN) },
+	},
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT(EV_KEY) },
+		.keybit = { [LONG(KEY_BLUETOOTH)] = BIT(KEY_BLUETOOTH) },
+	},
+	{ }
+};
+
+static struct input_handler rfkill_handler = {
+	.event =	rfkill_event,
+	.connect =	rfkill_connect,
+	.disconnect =	rfkill_disconnect,
+	.name =		"rfkill",
+	.id_table =	rfkill_ids,
+};
+
+static int __init rfkill_handler_init(void)
+{
+	return input_register_handler(&rfkill_handler);
+}
+
+static void __exit rfkill_handler_exit(void)
+{
+	input_unregister_handler(&rfkill_handler);
+	flush_scheduled_work();
+}
+
+module_init(rfkill_handler_init);
+module_exit(rfkill_handler_exit);

net/rfkill/rfkill.c

+/*
+ * Copyright (C) 2006 Ivo van Doorn
+ * Copyright (C) 2007 Dmitry Torokhov
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/capability.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/rfkill.h>
+
+MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
+MODULE_VERSION("1.0");
+MODULE_DESCRIPTION("RF switch support");
+MODULE_LICENSE("GPL");
+
+static LIST_HEAD(rfkill_list);	/* list of registered rf switches */
+static DEFINE_MUTEX(rfkill_mutex);
+
+static enum rfkill_state rfkill_states[RFKILL_TYPE_MAX];
+
+static int rfkill_toggle_radio(struct rfkill *rfkill,
+				enum rfkill_state state)
+{
+	int retval;
+
+	retval = mutex_lock_interruptible(&rfkill->mutex);
+	if (retval)
+		return retval;
+
+	if (state != rfkill->state) {
+		retval = rfkill->toggle_radio(rfkill->data, state);
+		if (!retval)
+			rfkill->state = state;
+	}
+
+	mutex_unlock(&rfkill->mutex);
+	return retval;
+}
+
+/**
+ * rfkill_switch_all - Toggle state of all switches of given type
+ * @type: type of interfaces to be affeceted
+ * @state: the new state
+ *
+ * This function toggles state of all switches of given type unless
+ * a specific switch is claimed by userspace in which case it is
+ * left alone.
+ */
+
+void rfkill_switch_all(enum rfkill_type type, enum rfkill_state state)
+{
+	struct rfkill *rfkill;
+
+	mutex_lock(&rfkill_mutex);
+
+	rfkill_states[type] = state;
+
+	list_for_each_entry(rfkill, &rfkill_list, node) {
+		if (!rfkill->user_claim)
+			rfkill_toggle_radio(rfkill, state);
+	}
+
+	mutex_unlock(&rfkill_mutex);
+}
+EXPORT_SYMBOL(rfkill_switch_all);
+
+static ssize_t rfkill_name_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sprintf(buf, "%s\n", rfkill->name);
+}
+
+static ssize_t rfkill_type_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+	const char *type;
+
+	switch (rfkill->type) {
+	case RFKILL_TYPE_WLAN:
+		type = "wlan";
+		break;
+	case RFKILL_TYPE_BLUETOOTH:
+		type = "bluetooth";
+		break;
+	case RFKILL_TYPE_IRDA:
+		type = "irda";
+		break;
+	default:
+		BUG();
+	}
+
+	return sprintf(buf, "%s\n", type);
+}
+
+static ssize_t rfkill_state_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sprintf(buf, "%d\n", rfkill->state);
+}
+
+static ssize_t rfkill_state_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+	unsigned int state = simple_strtoul(buf, NULL, 0);
+	int error;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	error = rfkill_toggle_radio(rfkill,
+			state ? RFKILL_STATE_ON : RFKILL_STATE_OFF);
+	if (error)
+		return error;
+
+	return count;
+}
+
+static ssize_t rfkill_claim_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	return sprintf(buf, "%d", rfkill->user_claim);
+}
+
+static ssize_t rfkill_claim_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+	bool claim = !!simple_strtoul(buf, NULL, 0);
+	int error;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	/*
+	 * Take the global lock to make sure the kernel is not in
+	 * the middle of rfkill_switch_all
+	 */
+	error = mutex_lock_interruptible(&rfkill_mutex);
+	if (error)
+		return error;
+
+	if (rfkill->user_claim != claim) {
+		if (!claim)
+			rfkill_toggle_radio(rfkill,
+					    rfkill_states[rfkill->type]);
+		rfkill->user_claim = claim;
+	}
+
+	mutex_unlock(&rfkill_mutex);
+
+	return count;
+}
+
+static struct device_attribute rfkill_dev_attrs[] = {
+	__ATTR(name, S_IRUGO, rfkill_name_show, NULL),
+	__ATTR(type, S_IRUGO, rfkill_type_show, NULL),
+	__ATTR(state, S_IRUGO, rfkill_state_show, rfkill_state_store),
+	__ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store),
+	__ATTR_NULL
+};
+
+static void rfkill_release(struct device *dev)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	kfree(rfkill);
+	module_put(THIS_MODULE);
+}
+
+#ifdef CONFIG_PM
+static int rfkill_suspend(struct device *dev, pm_message_t state)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	if (dev->power.power_state.event != state.event) {
+		if (state.event == PM_EVENT_SUSPEND) {
+			mutex_lock(&rfkill->mutex);
+
+			if (rfkill->state == RFKILL_STATE_ON)
+				rfkill->toggle_radio(rfkill->data,
+						     RFKILL_STATE_OFF);
+
+			mutex_unlock(&rfkill->mutex);
+		}
+
+		dev->power.power_state = state;
+	}
+
+	return 0;
+}
+
+static int rfkill_resume(struct device *dev)
+{
+	struct rfkill *rfkill = to_rfkill(dev);
+
+	if (dev->power.power_state.event != PM_EVENT_ON) {
+		mutex_lock(&rfkill->mutex);
+
+		if (rfkill->state == RFKILL_STATE_ON)
+			rfkill->toggle_radio(rfkill->data, RFKILL_STATE_ON);
+
+		mutex_unlock(&rfkill->mutex);
+	}
+
+	dev->power.power_state = PMSG_ON;
+	return 0;
+}
+#else
+#define rfkill_suspend NULL
+#define rfkill_resume NULL
+#endif
+
+static struct class rfkill_class = {
+	.name		= "rfkill",
+	.dev_release	= rfkill_release,
+	.dev_attrs	= rfkill_dev_attrs,
+	.suspend	= rfkill_suspend,
+	.resume		= rfkill_resume,
+};
+
+static int rfkill_add_switch(struct rfkill *rfkill)
+{
+	int retval;
+
+	retval = mutex_lock_interruptible(&rfkill_mutex);
+	if (retval)
+		return retval;
+
+	retval = rfkill_toggle_radio(rfkill, rfkill_states[rfkill->type]);
+	if (retval)
+		goto out;
+
+	list_add_tail(&rfkill->node, &rfkill_list);
+
+ out:
+	mutex_unlock(&rfkill_mutex);
+	return retval;
+}
+
+static void rfkill_remove_switch(struct rfkill *rfkill)
+{
+	mutex_lock(&rfkill_mutex);
+	list_del_init(&rfkill->node);
+	rfkill_toggle_radio(rfkill, RFKILL_STATE_OFF);
+	mutex_unlock(&rfkill_mutex);
+}
+
+/**
+ * rfkill_allocate - allocate memory for rfkill structure.
+ * @parent: device that has rf switch on it
+ * @type: type of the switch (wlan, bluetooth, irda)
+ *
+ * This function should be called by the network driver when it needs
+ * rfkill structure. Once the structure is allocated the driver shoud
+ * finish its initialization by setting name, private data, enable_radio
+ * and disable_radio methods and then register it with rfkill_register().
+ * NOTE: If registration fails the structure shoudl be freed by calling
+ * rfkill_free() otherwise rfkill_unregister() should be used.
+ */
+struct rfkill *rfkill_allocate(struct device *parent, enum rfkill_type type)
+{
+	struct rfkill *rfkill;
+	struct device *dev;
+
+	rfkill = kzalloc(sizeof(struct rfkill), GFP_KERNEL);
+	if (rfkill)
+		return NULL;
+
+	mutex_init(&rfkill->mutex);
+	INIT_LIST_HEAD(&rfkill->node);
+	rfkill->type = type;
+
+	dev = &rfkill->dev;
+	dev->class = &rfkill_class;
+	dev->parent = parent;
+	device_initialize(dev);
+
+	__module_get(THIS_MODULE);
+
+	return rfkill;
+}
+EXPORT_SYMBOL(rfkill_allocate);
+
+/**
+ * rfkill_free - Mark rfkill structure for deletion
+ * @rfkill: rfkill structure to be destroyed
+ *
+ * Decrements reference count of rfkill structure so it is destoryed.
+ * Note that rfkill_free() should _not_ be called after rfkill_unregister().
+ */
+void rfkill_free(struct rfkill *rfkill)
+{
+	if (rfkill)
+		put_device(&rfkill->dev);
+}
+EXPORT_SYMBOL(rfkill_free);
+
+/**
+ * rfkill_register - Register a rfkill structure.
+ * @rfkill: rfkill structure to be registered
+ *
+ * This function should be called by the network driver when the rfkill
+ * structure needs to be registered. Immediately from registration the
+ * switch driver should be able to service calls to toggle_radio.
+ */
+int rfkill_register(struct rfkill *rfkill)
+{
+	static atomic_t rfkill_no = ATOMIC_INIT(0);
+	struct device *dev = &rfkill->dev;
+	int error;
+
+	if (!rfkill->toggle_radio)
+		return -EINVAL;
+
+	error = rfkill_add_switch(rfkill);
+	if (error)
+		return error;
+
+	snprintf(dev->bus_id, sizeof(dev->bus_id),
+		 "rfkill%ld", (long)atomic_inc_return(&rfkill_no) - 1);
+
+	error = device_add(dev);
+	if (error) {
+		rfkill_remove_switch(rfkill);
+		return error;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(rfkill_register);
+
+/**
+ * rfkill_unregister - Uegister a rfkill structure.
+ * @rfkill: rfkill structure to be unregistered
+ *
+ * This function should be called by the network driver during device
+ * teardown to destroy rfkill structure. Note that rfkill_free() should
+ * _not_ be called after rfkill_unregister().
+ */
+void rfkill_unregister(struct rfkill *rfkill)
+{
+	device_del(&rfkill->dev);
+	rfkill_remove_switch(rfkill);
+	put_device(&rfkill->dev);
+}
+EXPORT_SYMBOL(rfkill_unregister);
+
+/*
+ * Rfkill module initialization/deinitialization.
+ */
+static int __init rfkill_init(void)
+{
+	int error;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(rfkill_states); i++)
+		rfkill_states[i] = RFKILL_STATE_ON;
+
+	error = class_register(&rfkill_class);
+	if (error) {
+		printk(KERN_ERR "rfkill: unable to register rfkill class\n");
+		return error;
+	}
+
+	return 0;
+}
+
+static void __exit rfkill_exit(void)
+{
+	class_unregister(&rfkill_class);
+}
+
+module_init(rfkill_init);
+module_exit(rfkill_exit);