Merge branch 'linux-2.6.31.y' of git://git.kernel.org/pub/scm/linux/kernel/git/inaky/wimax

14 files changed, 222 insertions, 69 deletions

diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c
index b3cadb626fe0..bd193ae2178b 100644
--- a/drivers/net/wimax/i2400m/control.c
+++ b/drivers/net/wimax/i2400m/control.c
@@ -292,8 +292,6 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m,
 
 	d_fnstart(3, dev, "(i2400m %p ss %p [%u])\n", i2400m, ss, i2400m_state);
 
-	if (unlikely(i2400m->ready == 0))	/* act if up */
-		goto out;
 	if (i2400m->state != i2400m_state) {
 		i2400m->state = i2400m_state;
 		wake_up_all(&i2400m->state_wq);
@@ -341,7 +339,6 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m,
 		i2400m->bus_reset(i2400m, I2400M_RT_WARM);
 		break;
 	};
-out:
 	d_fnend(3, dev, "(i2400m %p ss %p [%u]) = void\n",
 		i2400m, ss, i2400m_state);
 }
@@ -372,8 +369,6 @@ void i2400m_report_tlv_media_status(struct i2400m *i2400m,
 
 	d_fnstart(3, dev, "(i2400m %p ms %p [%u])\n", i2400m, ms, status);
 
-	if (unlikely(i2400m->ready == 0))	/* act if up */
-		goto out;
 	switch (status) {
 	case I2400M_MEDIA_STATUS_LINK_UP:
 		netif_carrier_on(net_dev);
@@ -393,14 +388,59 @@ void i2400m_report_tlv_media_status(struct i2400m *i2400m,
 		dev_err(dev, "HW BUG? unknown media status %u\n",
 			status);
 	};
-out:
 	d_fnend(3, dev, "(i2400m %p ms %p [%u]) = void\n",
 		i2400m, ms, status);
 }
 
 
 /*
- * Parse a 'state report' and extract carrier on/off information
+ * Process a TLV from a 'state report'
+ *
+ * @i2400m: device descriptor
+ * @tlv: pointer to the TLV header; it has been already validated for
+ *     consistent size.
+ * @tag: for error messages
+ *
+ * Act on the TLVs from a 'state report'.
+ */
+static
+void i2400m_report_state_parse_tlv(struct i2400m *i2400m,
+				   const struct i2400m_tlv_hdr *tlv,
+				   const char *tag)
+{
+	struct device *dev = i2400m_dev(i2400m);
+	const struct i2400m_tlv_media_status *ms;
+	const struct i2400m_tlv_system_state *ss;
+	const struct i2400m_tlv_rf_switches_status *rfss;
+
+	if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE, sizeof(*ss))) {
+		ss = container_of(tlv, typeof(*ss), hdr);
+		d_printf(2, dev, "%s: system state TLV "
+			 "found (0x%04x), state 0x%08x\n",
+			 tag, I2400M_TLV_SYSTEM_STATE,
+			 le32_to_cpu(ss->state));
+		i2400m_report_tlv_system_state(i2400m, ss);
+	}
+	if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS, sizeof(*rfss))) {
+		rfss = container_of(tlv, typeof(*rfss), hdr);
+		d_printf(2, dev, "%s: RF status TLV "
+			 "found (0x%04x), sw 0x%02x hw 0x%02x\n",
+			 tag, I2400M_TLV_RF_STATUS,
+			 le32_to_cpu(rfss->sw_rf_switch),
+			 le32_to_cpu(rfss->hw_rf_switch));
+		i2400m_report_tlv_rf_switches_status(i2400m, rfss);
+	}
+	if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS, sizeof(*ms))) {
+		ms = container_of(tlv, typeof(*ms), hdr);
+		d_printf(2, dev, "%s: Media Status TLV: %u\n",
+			 tag, le32_to_cpu(ms->media_status));
+		i2400m_report_tlv_media_status(i2400m, ms);
+	}
+}
+
+
+/*
+ * Parse a 'state report' and extract information
  *
  * @i2400m: device descriptor
  * @l3l4_hdr: pointer to message; it has been already validated for
@@ -409,13 +449,7 @@ out:
  *        declaration is assumed to be congruent with @size (as in
  *        sizeof(*l3l4_hdr) + l3l4_hdr->length == size)
  *
- * Extract from the report state the system state TLV and infer from
- * there if we have a carrier or not. Update our local state and tell
- * netdev.
- *
- * When setting the carrier, it's fine to set OFF twice (for example),
- * as netif_carrier_off() will not generate two OFF events (just on
- * the transitions).
+ * Walk over the TLVs in a report state and act on them.
  */
 static
 void i2400m_report_state_hook(struct i2400m *i2400m,
@@ -424,9 +458,6 @@ void i2400m_report_state_hook(struct i2400m *i2400m,
 {
 	struct device *dev = i2400m_dev(i2400m);
 	const struct i2400m_tlv_hdr *tlv;
-	const struct i2400m_tlv_system_state *ss;
-	const struct i2400m_tlv_rf_switches_status *rfss;
-	const struct i2400m_tlv_media_status *ms;
 	size_t tlv_size = le16_to_cpu(l3l4_hdr->length);
 
 	d_fnstart(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s)\n",
@@ -434,34 +465,8 @@ void i2400m_report_state_hook(struct i2400m *i2400m,
 	tlv = NULL;
 
 	while ((tlv = i2400m_tlv_buffer_walk(i2400m, &l3l4_hdr->pl,
-					     tlv_size, tlv))) {
-		if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE,
-					  sizeof(*ss))) {
-			ss = container_of(tlv, typeof(*ss), hdr);
-			d_printf(2, dev, "%s: system state TLV "
-				 "found (0x%04x), state 0x%08x\n",
-				 tag, I2400M_TLV_SYSTEM_STATE,
-				 le32_to_cpu(ss->state));
-			i2400m_report_tlv_system_state(i2400m, ss);
-		}
-		if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS,
-					  sizeof(*rfss))) {
-			rfss = container_of(tlv, typeof(*rfss), hdr);
-			d_printf(2, dev, "%s: RF status TLV "
-				 "found (0x%04x), sw 0x%02x hw 0x%02x\n",
-				 tag, I2400M_TLV_RF_STATUS,
-				 le32_to_cpu(rfss->sw_rf_switch),
-				 le32_to_cpu(rfss->hw_rf_switch));
-			i2400m_report_tlv_rf_switches_status(i2400m, rfss);
-		}
-		if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS,
-					  sizeof(*ms))) {
-			ms = container_of(tlv, typeof(*ms), hdr);
-			d_printf(2, dev, "%s: Media Status TLV: %u\n",
-				 tag, le32_to_cpu(ms->media_status));
-			i2400m_report_tlv_media_status(i2400m, ms);
-		}
-	}
+					     tlv_size, tlv)))
+		i2400m_report_state_parse_tlv(i2400m, tlv, tag);
 	d_fnend(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s) = void\n",
 		i2400m, l3l4_hdr, size, tag);
 }
@@ -721,6 +726,8 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m,
 		ack_timeout = HZ;
 	};
 
+	if (unlikely(i2400m->trace_msg_from_user))
+		wimax_msg(&i2400m->wimax_dev, "echo", buf, buf_len, GFP_KERNEL);
 	/* The RX path in rx.c will put any response for this message
 	 * in i2400m->ack_skb and wake us up. If we cancel the wait,
 	 * we need to change the value of i2400m->ack_skb to something
@@ -755,6 +762,9 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m,
 	ack_l3l4_hdr = wimax_msg_data_len(ack_skb, &ack_len);
 
 	/* Check the ack and deliver it if it is ok */
+	if (unlikely(i2400m->trace_msg_from_user))
+		wimax_msg(&i2400m->wimax_dev, "echo",
+			  ack_l3l4_hdr, ack_len, GFP_KERNEL);
 	result = i2400m_msg_size_check(i2400m, ack_l3l4_hdr, ack_len);
 	if (result < 0) {
 		dev_err(dev, "HW BUG? reply to message 0x%04x: %d\n",
diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c
index 07a54bad237b..ef16c573bb22 100644
--- a/drivers/net/wimax/i2400m/driver.c
+++ b/drivers/net/wimax/i2400m/driver.c
@@ -62,6 +62,7 @@
  *   unregister_netdev()
  */
 #include "i2400m.h"
+#include <linux/etherdevice.h>
 #include <linux/wimax/i2400m.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -234,9 +235,6 @@ int i2400m_op_msg_from_user(struct wimax_dev *wimax_dev,
 	result = PTR_ERR(ack_skb);
 	if (IS_ERR(ack_skb))
 		goto error_msg_to_dev;
-	if (unlikely(i2400m->trace_msg_from_user))
-		wimax_msg(&i2400m->wimax_dev, "trace",
-			  msg_buf, msg_len, GFP_KERNEL);
 	result = wimax_msg_send(&i2400m->wimax_dev, ack_skb);
 error_msg_to_dev:
 	d_fnend(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p msg_len %zu "
@@ -650,6 +648,7 @@ int i2400m_setup(struct i2400m *i2400m, enum i2400m_bri bm_flags)
 	result = i2400m_read_mac_addr(i2400m);
 	if (result < 0)
 		goto error_read_mac_addr;
+	random_ether_addr(i2400m->src_mac_addr);
 
 	result = register_netdev(net_dev);	/* Okey dokey, bring it up */
 	if (result < 0) {
diff --git a/drivers/net/wimax/i2400m/i2400m.h b/drivers/net/wimax/i2400m/i2400m.h
index 3ae2df38b59a..434ba310c2fe 100644
--- a/drivers/net/wimax/i2400m/i2400m.h
+++ b/drivers/net/wimax/i2400m/i2400m.h
@@ -323,6 +323,10 @@ struct i2400m_roq;
  *     delivered. Then the driver can release them to the host. See
  *     drivers/net/i2400m/rx.c for details.
  *
+ * @src_mac_addr: MAC address used to make ethernet packets be coming
+ *     from. This is generated at i2400m_setup() time and used during
+ *     the life cycle of the instance. See i2400m_fake_eth_header().
+ *
  * @init_mutex: Mutex used for serializing the device bringup
  *     sequence; this way if the device reboots in the middle, we
  *     don't try to do a bringup again while we are tearing down the
@@ -421,6 +425,7 @@ struct i2400m {
 	unsigned rx_pl_num, rx_pl_max, rx_pl_min,
 		rx_num, rx_size_acc, rx_size_min, rx_size_max;
 	struct i2400m_roq *rx_roq;	/* not under rx_lock! */
+	u8 src_mac_addr[ETH_HLEN];
 
 	struct mutex msg_mutex;		/* serialize command execution */
 	struct completion msg_completion;
diff --git a/drivers/net/wimax/i2400m/netdev.c b/drivers/net/wimax/i2400m/netdev.c
index 6b1fe7a81f25..9653f478b382 100644
--- a/drivers/net/wimax/i2400m/netdev.c
+++ b/drivers/net/wimax/i2400m/netdev.c
@@ -404,10 +404,12 @@ static
 void i2400m_rx_fake_eth_header(struct net_device *net_dev,
 			       void *_eth_hdr, __be16 protocol)
 {
+	struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
 	struct ethhdr *eth_hdr = _eth_hdr;
 
 	memcpy(eth_hdr->h_dest, net_dev->dev_addr, sizeof(eth_hdr->h_dest));
-	memset(eth_hdr->h_source, 0, sizeof(eth_hdr->h_dest));
+	memcpy(eth_hdr->h_source, i2400m->src_mac_addr,
+	       sizeof(eth_hdr->h_source));
 	eth_hdr->h_proto = protocol;
 }
 
diff --git a/drivers/net/wimax/i2400m/rx.c b/drivers/net/wimax/i2400m/rx.c
index f9fc38902322..7643850a6fb8 100644
--- a/drivers/net/wimax/i2400m/rx.c
+++ b/drivers/net/wimax/i2400m/rx.c
@@ -177,7 +177,8 @@ void i2400m_report_hook_work(struct work_struct *ws)
 	struct i2400m_work *iw =
 		container_of(ws, struct i2400m_work, ws);
 	struct i2400m_report_hook_args *args = (void *) iw->pl;
-	i2400m_report_hook(iw->i2400m, args->l3l4_hdr, args->size);
+	if (iw->i2400m->ready)
+		i2400m_report_hook(iw->i2400m, args->l3l4_hdr, args->size);
 	kfree_skb(args->skb_rx);
 	i2400m_put(iw->i2400m);
 	kfree(iw);
@@ -309,6 +310,9 @@ void i2400m_rx_ctl(struct i2400m *i2400m, struct sk_buff *skb_rx,
 		skb_get(skb_rx);
 		i2400m_queue_work(i2400m, i2400m_report_hook_work,
 				  GFP_KERNEL, &args, sizeof(args));
+		if (unlikely(i2400m->trace_msg_from_user))
+			wimax_msg(&i2400m->wimax_dev, "echo",
+				  l3l4_hdr, size, GFP_KERNEL);
 		result = wimax_msg(&i2400m->wimax_dev, NULL, l3l4_hdr, size,
 				   GFP_KERNEL);
 		if (result < 0)
diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c
index 5ac5e76701cd..777c981676fc 100644
--- a/drivers/net/wimax/i2400m/sdio.c
+++ b/drivers/net/wimax/i2400m/sdio.c
@@ -409,19 +409,19 @@ int i2400ms_probe(struct sdio_func *func,
 	i2400m->bus_fw_names = i2400ms_bus_fw_names;
 	i2400m->bus_bm_mac_addr_impaired = 1;
 
-	result = i2400ms_enable_function(i2400ms->func);
-	if (result < 0) {
-		dev_err(dev, "Cannot enable SDIO function: %d\n", result);
-		goto error_func_enable;
-	}
-
 	sdio_claim_host(func);
 	result = sdio_set_block_size(func, I2400MS_BLK_SIZE);
+	sdio_release_host(func);
 	if (result < 0) {
 		dev_err(dev, "Failed to set block size: %d\n", result);
 		goto error_set_blk_size;
 	}
-	sdio_release_host(func);
+
+	result = i2400ms_enable_function(i2400ms->func);
+	if (result < 0) {
+		dev_err(dev, "Cannot enable SDIO function: %d\n", result);
+		goto error_func_enable;
+	}
 
 	result = i2400m_setup(i2400m, I2400M_BRI_NO_REBOOT);
 	if (result < 0) {
@@ -440,12 +440,12 @@ int i2400ms_probe(struct sdio_func *func,
 error_debugfs_add:
 	i2400m_release(i2400m);
 error_setup:
-	sdio_set_drvdata(func, NULL);
 	sdio_claim_host(func);
-error_set_blk_size:
 	sdio_disable_func(func);
 	sdio_release_host(func);
 error_func_enable:
+error_set_blk_size:
+	sdio_set_drvdata(func, NULL);
 	free_netdev(net_dev);
 error_alloc_netdev:
 	return result;
diff --git a/drivers/net/wimax/i2400m/usb.c b/drivers/net/wimax/i2400m/usb.c
index ca4151a9e222..17851321b7fd 100644
--- a/drivers/net/wimax/i2400m/usb.c
+++ b/drivers/net/wimax/i2400m/usb.c
@@ -505,27 +505,52 @@ int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg)
 #ifdef CONFIG_PM
 	struct usb_device *usb_dev = i2400mu->usb_dev;
 #endif
+	unsigned is_autosuspend = 0;
 	struct i2400m *i2400m = &i2400mu->i2400m;
 
+#ifdef CONFIG_PM
+	if (usb_dev->auto_pm > 0)
+		is_autosuspend = 1;
+#endif
+
 	d_fnstart(3, dev, "(iface %p pm_msg %u)\n", iface, pm_msg.event);
 	if (i2400m->updown == 0)
 		goto no_firmware;
-	d_printf(1, dev, "fw up, requesting standby\n");
+	if (i2400m->state == I2400M_SS_DATA_PATH_CONNECTED && is_autosuspend) {
+		/* ugh -- the device is connected and this suspend
+		 * request is an autosuspend one (not a system standby
+		 * / hibernate).
+		 *
+		 * The only way the device can go to standby is if the
+		 * link with the base station is in IDLE mode; that
+		 * were the case, we'd be in status
+		 * I2400M_SS_CONNECTED_IDLE. But we are not.
+		 *
+		 * If we *tell* him to go power save now, it'll reset
+		 * as a precautionary measure, so if this is an
+		 * autosuspend thing, say no and it'll come back
+		 * later, when the link is IDLE
+		 */
+		result = -EBADF;
+		d_printf(1, dev, "fw up, link up, not-idle, autosuspend: "
+			 "not entering powersave\n");
+		goto error_not_now;
+	}
+	d_printf(1, dev, "fw up: entering powersave\n");
 	atomic_dec(&i2400mu->do_autopm);
 	result = i2400m_cmd_enter_powersave(i2400m);
 	atomic_inc(&i2400mu->do_autopm);
-#ifdef CONFIG_PM
-	if (result < 0 && usb_dev->auto_pm == 0) {
+	if (result < 0 && !is_autosuspend) {
 		/* System suspend, can't fail */
 		dev_err(dev, "failed to suspend, will reset on resume\n");
 		result = 0;
 	}
-#endif
 	if (result < 0)
 		goto error_enter_powersave;
 	i2400mu_notification_release(i2400mu);
-	d_printf(1, dev, "fw up, got standby\n");
+	d_printf(1, dev, "powersave requested\n");
 error_enter_powersave:
+error_not_now:
 no_firmware:
 	d_fnend(3, dev, "(iface %p pm_msg %u) = %d\n",
 		iface, pm_msg.event, result);
diff --git a/include/linux/wimax.h b/include/linux/wimax.h
index c89de7f4e5b9..4fdcc5635518 100644
--- a/include/linux/wimax.h
+++ b/include/linux/wimax.h
@@ -59,7 +59,7 @@ enum {
 	 * M - Major: change if removing or modifying an existing call.
 	 * m - minor: change when adding a new call
 	 */
-	WIMAX_GNL_VERSION = 00,
+	WIMAX_GNL_VERSION = 01,
 	/* Generic NetLink attributes */
 	WIMAX_GNL_ATTR_INVALID = 0x00,
 	WIMAX_GNL_ATTR_MAX = 10,
@@ -78,6 +78,7 @@ enum {
 	WIMAX_GNL_OP_RFKILL,	/* Run wimax_rfkill() */
 	WIMAX_GNL_OP_RESET,	/* Run wimax_rfkill() */
 	WIMAX_GNL_RE_STATE_CHANGE,	/* Report: status change */
+	WIMAX_GNL_OP_STATE_GET,		/* Request for current state */
 };
 
 
@@ -113,6 +114,10 @@ enum {
 	WIMAX_GNL_RESET_IFIDX = 1,
 };
 
+/* Atributes for wimax_state_get() */
+enum {
+	WIMAX_GNL_STGET_IFIDX = 1,
+};
 
 /*
  * Attributes for the Report State Change
diff --git a/net/wimax/Makefile b/net/wimax/Makefile
index 5b80b941c2c9..8f1510d0cc2b 100644
--- a/net/wimax/Makefile
+++ b/net/wimax/Makefile
@@ -6,6 +6,7 @@ wimax-y :=		\
 	op-msg.o	\
 	op-reset.o	\
 	op-rfkill.o	\
+	op-state-get.o	\
 	stack.o
 
 wimax-$(CONFIG_DEBUG_FS) += debugfs.o
diff --git a/net/wimax/debug-levels.h b/net/wimax/debug-levels.h
index 1c29123a3aa9..0975adba6b71 100644
--- a/net/wimax/debug-levels.h
+++ b/net/wimax/debug-levels.h
@@ -36,6 +36,7 @@ enum d_module {
 	D_SUBMODULE_DECLARE(op_msg),
 	D_SUBMODULE_DECLARE(op_reset),
 	D_SUBMODULE_DECLARE(op_rfkill),
+	D_SUBMODULE_DECLARE(op_state_get),
 	D_SUBMODULE_DECLARE(stack),
 };
 
diff --git a/net/wimax/debugfs.c b/net/wimax/debugfs.c
index 94d216a46407..6c9bedb7431e 100644
--- a/net/wimax/debugfs.c
+++ b/net/wimax/debugfs.c
@@ -61,6 +61,7 @@ int wimax_debugfs_add(struct wimax_dev *wimax_dev)
 	__debugfs_register("wimax_dl_", op_msg, dentry);
 	__debugfs_register("wimax_dl_", op_reset, dentry);
 	__debugfs_register("wimax_dl_", op_rfkill, dentry);
+	__debugfs_register("wimax_dl_", op_state_get, dentry);
 	__debugfs_register("wimax_dl_", stack, dentry);
 	result = 0;
 out:
diff --git a/net/wimax/op-msg.c b/net/wimax/op-msg.c
index 9ad4d893a566..d631a17186bc 100644
--- a/net/wimax/op-msg.c
+++ b/net/wimax/op-msg.c
@@ -108,6 +108,12 @@
  * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
  * wimax_msg_send() depends on skb->data being placed at the
  * beginning of the user message.
+ *
+ * Unlike other WiMAX stack calls, this call can be used way early,
+ * even before wimax_dev_add() is called, as long as the
+ * wimax_dev->net_dev pointer is set to point to a proper
+ * net_dev. This is so that drivers can use it early in case they need
+ * to send stuff around or communicate with user space.
  */
 struct sk_buff *wimax_msg_alloc(struct wimax_dev *wimax_dev,
 				const char *pipe_name,
@@ -115,7 +121,7 @@ struct sk_buff *wimax_msg_alloc(struct wimax_dev *wimax_dev,
 				gfp_t gfp_flags)
 {
 	int result;
-	struct device *dev = wimax_dev->net_dev->dev.parent;
+	struct device *dev = wimax_dev_to_dev(wimax_dev);
 	size_t msg_size;
 	void *genl_msg;
 	struct sk_buff *skb;
@@ -161,7 +167,6 @@ error_genlmsg_put:
 error_new:
 	nlmsg_free(skb);
 	return ERR_PTR(result);
-
 }
 EXPORT_SYMBOL_GPL(wimax_msg_alloc);
 
@@ -256,10 +261,16 @@ EXPORT_SYMBOL_GPL(wimax_msg_len);
  * Don't use skb_push()/skb_pull()/skb_reserve() on the skb, as
  * wimax_msg_send() depends on skb->data being placed at the
  * beginning of the user message.
+ *
+ * Unlike other WiMAX stack calls, this call can be used way early,
+ * even before wimax_dev_add() is called, as long as the
+ * wimax_dev->net_dev pointer is set to point to a proper
+ * net_dev. This is so that drivers can use it early in case they need
+ * to send stuff around or communicate with user space.
  */
 int wimax_msg_send(struct wimax_dev *wimax_dev, struct sk_buff *skb)
 {
-	struct device *dev = wimax_dev->net_dev->dev.parent;
+	struct device *dev = wimax_dev_to_dev(wimax_dev);
 	void *msg = skb->data;
 	size_t size = skb->len;
 	might_sleep();
diff --git a/net/wimax/op-state-get.c b/net/wimax/op-state-get.c
new file mode 100644
index 000000000000..a76b8fcb056d
--- /dev/null
+++ b/net/wimax/op-state-get.c
@@ -0,0 +1,86 @@
+/*
+ * Linux WiMAX
+ * Implement and export a method for getting a WiMAX device current state
+ *
+ * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * Based on previous WiMAX core work by:
+ *  Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
+ *  Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * 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.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <net/wimax.h>
+#include <net/genetlink.h>
+#include <linux/wimax.h>
+#include <linux/security.h>
+#include "wimax-internal.h"
+
+#define D_SUBMODULE op_state_get
+#include "debug-levels.h"
+
+
+static const
+struct nla_policy wimax_gnl_state_get_policy[WIMAX_GNL_ATTR_MAX + 1] = {
+	[WIMAX_GNL_STGET_IFIDX] = {
+		.type = NLA_U32,
+	},
+};
+
+
+/*
+ * Exporting to user space over generic netlink
+ *
+ * Parse the state get command from user space, return a combination
+ * value that describe the current state.
+ *
+ * No attributes.
+ */
+static
+int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
+{
+	int result, ifindex;
+	struct wimax_dev *wimax_dev;
+	struct device *dev;
+
+	d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
+	result = -ENODEV;
+	if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
+		printk(KERN_ERR "WIMAX_GNL_OP_STATE_GET: can't find IFIDX "
+			"attribute\n");
+		goto error_no_wimax_dev;
+	}
+	ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
+	wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
+	if (wimax_dev == NULL)
+		goto error_no_wimax_dev;
+	dev = wimax_dev_to_dev(wimax_dev);
+	/* Execute the operation and send the result back to user space */
+	result = wimax_state_get(wimax_dev);
+	dev_put(wimax_dev->net_dev);
+error_no_wimax_dev:
+	d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
+	return result;
+}
+
+
+struct genl_ops wimax_gnl_state_get = {
+	.cmd = WIMAX_GNL_OP_STATE_GET,
+	.flags = GENL_ADMIN_PERM,
+	.policy = wimax_gnl_state_get_policy,
+	.doit = wimax_gnl_doit_state_get,
+	.dumpit = NULL,
+};
diff --git a/net/wimax/stack.c b/net/wimax/stack.c
index 933e1422b09f..79fb7d7c640f 100644
--- a/net/wimax/stack.c
+++ b/net/wimax/stack.c
@@ -402,13 +402,15 @@ EXPORT_SYMBOL_GPL(wimax_dev_init);
 extern struct genl_ops
 	wimax_gnl_msg_from_user,
 	wimax_gnl_reset,
-	wimax_gnl_rfkill;
+	wimax_gnl_rfkill,
+	wimax_gnl_state_get;
 
 static
 struct genl_ops *wimax_gnl_ops[] = {
 	&wimax_gnl_msg_from_user,
 	&wimax_gnl_reset,
 	&wimax_gnl_rfkill,
+	&wimax_gnl_state_get,
 };
 
 
@@ -533,6 +535,7 @@ struct d_level D_LEVEL[] = {
 	D_SUBMODULE_DEFINE(op_msg),
 	D_SUBMODULE_DEFINE(op_reset),
 	D_SUBMODULE_DEFINE(op_rfkill),
+	D_SUBMODULE_DEFINE(op_state_get),
 	D_SUBMODULE_DEFINE(stack),
 };
 size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);