Merge branch 'linux-2.6.33.y' of git://git.kernel.org/pub/scm/linux/kernel/git/inaky/wimax

drivers/net/wimax/i2400m/control.c

@@ -54,7 +54,7 @@
  *   i2400m_set_init_config()
  *   i2400m_cmd_get_state()
  * i2400m_dev_shutdown()        Called by i2400m_dev_stop()
- *   i2400m->bus_reset()
+ *   i2400m_reset()
  *
  * i2400m_{cmd,get,set}_*()
  *   i2400m_msg_to_dev()
@@ -82,6 +82,13 @@
 #define D_SUBMODULE control
 #include "debug-levels.h"
 
+int i2400m_passive_mode;	/* 0 (passive mode disabled) by default */
+module_param_named(passive_mode, i2400m_passive_mode, int, 0644);
+MODULE_PARM_DESC(passive_mode,
+		 "If true, the driver will not do any device setup "
+		 "and leave it up to user space, who must be properly "
+		 "setup.");
+
 
 /*
  * Return if a TLV is of a give type and size
@@ -263,7 +270,7 @@ int i2400m_msg_check_status(const struct i2400m_l3l4_hdr *l3l4_hdr,
 
 	if (status == 0)
 		return 0;
-	if (status > ARRAY_SIZE(ms_to_errno)) {
+	if (status >= ARRAY_SIZE(ms_to_errno)) {
 		str = "unknown status code";
 		result = -EBADR;
 	} else {
@@ -336,7 +343,7 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m,
 		/* Huh? just in case, shut it down */
 		dev_err(dev, "HW BUG? unknown state %u: shutting down\n",
 			i2400m_state);
-		i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+		i2400m_reset(i2400m, I2400M_RT_WARM);
 		break;
 	};
 	d_fnend(3, dev, "(i2400m %p ss %p [%u]) = void\n",
@@ -1335,6 +1342,8 @@ int i2400m_dev_initialize(struct i2400m *i2400m)
 	unsigned argc = 0;
 
 	d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+	if (i2400m_passive_mode)
+		goto out_passive;
 	/* Disable idle mode? (enabled by default) */
 	if (i2400m_idle_mode_disabled) {
 		if (i2400m_le_v1_3(i2400m)) {
@@ -1377,6 +1386,7 @@ int i2400m_dev_initialize(struct i2400m *i2400m)
 	result = i2400m_set_init_config(i2400m, args, argc);
 	if (result < 0)
 		goto error;
+out_passive:
 	/*
 	 * Update state: Here it just calls a get state; parsing the
 	 * result (System State TLV and RF Status TLV [done in the rx

drivers/net/wimax/i2400m/debugfs.c

@@ -214,7 +214,7 @@ int debugfs_i2400m_reset_set(void *data, u64 val)
 	case I2400M_RT_WARM:
 	case I2400M_RT_COLD:
 	case I2400M_RT_BUS:
-		result = i2400m->bus_reset(i2400m, rt);
+		result = i2400m_reset(i2400m, rt);
 		if (result >= 0)
 			result = 0;
 	default:

drivers/net/wimax/i2400m/i2400m-sdio.h

@@ -67,6 +67,7 @@
 
 /* Host-Device interface for SDIO */
 enum {
+	I2400M_SDIO_BOOT_RETRIES = 3,
 	I2400MS_BLK_SIZE = 256,
 	I2400MS_PL_SIZE_MAX = 0x3E00,
 
@@ -77,9 +78,11 @@ enum {
 	I2400MS_INTR_GET_SIZE_ADDR = 0x2C,
 	/* The number of ticks to wait for the device to signal that
 	 * it is ready */
-	I2400MS_INIT_SLEEP_INTERVAL = 10,
+	I2400MS_INIT_SLEEP_INTERVAL = 100,
 	/* How long to wait for the device to settle after reset */
 	I2400MS_SETTLE_TIME = 40,
+	/* The number of msec to wait for IOR after sending IOE */
+	IWMC3200_IOR_TIMEOUT = 10,
 };
 
 
@@ -97,6 +100,14 @@ enum {
  * @tx_workqueue: workqeueue used for data TX; we don't use the
  *     system's workqueue as that might cause deadlocks with code in
  *     the bus-generic driver.
+ *
+ * @debugfs_dentry: dentry for the SDIO specific debugfs files
+ *
+ *     Note this value is set to NULL upon destruction; this is
+ *     because some routinges use it to determine if we are inside the
+ *     probe() path or some other path. When debugfs is disabled,
+ *     creation sets the dentry to '(void*) -ENODEV', which is valid
+ *     for the test.
  */
 struct i2400ms {
 	struct i2400m i2400m;		/* FIRST! See doc */
@@ -111,6 +122,9 @@ struct i2400ms {
 	wait_queue_head_t bm_wfa_wq;
 	int bm_wait_result;
 	size_t bm_ack_size;
+
+	/* Device is any of the iwmc3200 SKUs */
+	unsigned iwmc3200:1;
 };
 
 

drivers/net/wimax/i2400m/i2400m-usb.h

@@ -88,6 +88,13 @@ struct edc {
 	u16 errorcount;
 };
 
+struct i2400m_endpoint_cfg {
+	unsigned char bulk_out;
+	unsigned char notification;
+	unsigned char reset_cold;
+	unsigned char bulk_in;
+};
+
 static inline void edc_init(struct edc *edc)
 {
 	edc->timestart = jiffies;
@@ -137,15 +144,13 @@ static inline int edc_inc(struct edc *edc, u16 max_err, u16 timeframe)
 
 /* Host-Device interface for USB */
 enum {
+	I2400M_USB_BOOT_RETRIES = 3,
 	I2400MU_MAX_NOTIFICATION_LEN = 256,
 	I2400MU_BLK_SIZE = 16,
 	I2400MU_PL_SIZE_MAX = 0x3EFF,
 
-	/* Endpoints */
-	I2400MU_EP_BULK_OUT = 0,
-	I2400MU_EP_NOTIFICATION,
-	I2400MU_EP_RESET_COLD,
-	I2400MU_EP_BULK_IN,
+	/* Device IDs */
+	USB_DEVICE_ID_I6050 = 0x0186,
 };
 
 
@@ -215,6 +220,7 @@ struct i2400mu {
 	struct usb_device *usb_dev;
 	struct usb_interface *usb_iface;
 	struct edc urb_edc;		/* Error density counter */
+	struct i2400m_endpoint_cfg endpoint_cfg;
 
 	struct urb *notif_urb;
 	struct task_struct *tx_kthread;

drivers/net/wimax/i2400m/netdev.c

@@ -74,6 +74,7 @@
  */
 #include <linux/if_arp.h>
 #include <linux/netdevice.h>
+#include <linux/ethtool.h>
 #include "i2400m.h"
 
 
@@ -88,7 +89,10 @@ enum {
 	 * The MTU is 1400 or less
 	 */
 	I2400M_MAX_MTU = 1400,
-	I2400M_TX_TIMEOUT = HZ,
+	/* 20 secs? yep, this is the maximum timeout that the device
+	 * might take to get out of IDLE / negotiate it with the base
+	 * station. We add 1sec for good measure. */
+	I2400M_TX_TIMEOUT = 21 * HZ,
 	I2400M_TX_QLEN = 5,
 };
 
@@ -101,22 +105,19 @@ int i2400m_open(struct net_device *net_dev)
 	struct device *dev = i2400m_dev(i2400m);
 
 	d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
-	if (i2400m->ready == 0) {
-		dev_err(dev, "Device is still initializing\n");
-		result = -EBUSY;
-	} else
+	/* Make sure we wait until init is complete... */
+	mutex_lock(&i2400m->init_mutex);
+	if (i2400m->updown)
 		result = 0;
+	else
+		result = -EBUSY;
+	mutex_unlock(&i2400m->init_mutex);
 	d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
 		net_dev, i2400m, result);
 	return result;
 }
 
 
-/*
- *
- * On kernel versions where cancel_work_sync() didn't return anything,
- * we rely on wake_tx_skb() being non-NULL.
- */
 static
 int i2400m_stop(struct net_device *net_dev)
 {
@@ -124,21 +125,7 @@ int i2400m_stop(struct net_device *net_dev)
 	struct device *dev = i2400m_dev(i2400m);
 
 	d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
-	/* See i2400m_hard_start_xmit(), references are taken there
-	 * and here we release them if the work was still
-	 * pending. Note we can't differentiate work not pending vs
-	 * never scheduled, so the NULL check does that. */
-	if (cancel_work_sync(&i2400m->wake_tx_ws) == 0
-	    && i2400m->wake_tx_skb != NULL) {
-		unsigned long flags;
-		struct sk_buff *wake_tx_skb;
-		spin_lock_irqsave(&i2400m->tx_lock, flags);
-		wake_tx_skb = i2400m->wake_tx_skb;	/* compat help */
-		i2400m->wake_tx_skb = NULL;	/* compat help */
-		spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-		i2400m_put(i2400m);
-		kfree_skb(wake_tx_skb);
-	}
+	i2400m_net_wake_stop(i2400m);
 	d_fnend(3, dev, "(net_dev %p [i2400m %p]) = 0\n", net_dev, i2400m);
 	return 0;
 }
@@ -167,6 +154,7 @@ void i2400m_wake_tx_work(struct work_struct *ws)
 {
 	int result;
 	struct i2400m *i2400m = container_of(ws, struct i2400m, wake_tx_ws);
+	struct net_device *net_dev = i2400m->wimax_dev.net_dev;
 	struct device *dev = i2400m_dev(i2400m);
 	struct sk_buff *skb = i2400m->wake_tx_skb;
 	unsigned long flags;
@@ -182,27 +170,36 @@ void i2400m_wake_tx_work(struct work_struct *ws)
 		dev_err(dev, "WAKE&TX: skb dissapeared!\n");
 		goto out_put;
 	}
+	/* If we have, somehow, lost the connection after this was
+	 * queued, don't do anything; this might be the device got
+	 * reset or just disconnected. */
+	if (unlikely(!netif_carrier_ok(net_dev)))
+		goto out_kfree;
 	result = i2400m_cmd_exit_idle(i2400m);
 	if (result == -EILSEQ)
 		result = 0;
 	if (result < 0) {
 		dev_err(dev, "WAKE&TX: device didn't get out of idle: "
-			"%d\n", result);
-			goto error;
+			"%d - resetting\n", result);
+		i2400m_reset(i2400m, I2400M_RT_BUS);
+		goto error;
 	}
 	result = wait_event_timeout(i2400m->state_wq,
-				    i2400m->state != I2400M_SS_IDLE, 5 * HZ);
+				    i2400m->state != I2400M_SS_IDLE,
+				    net_dev->watchdog_timeo - HZ/2);
 	if (result == 0)
 		result = -ETIMEDOUT;
 	if (result < 0) {
 		dev_err(dev, "WAKE&TX: error waiting for device to exit IDLE: "
-			"%d\n", result);
+			"%d - resetting\n", result);
+		i2400m_reset(i2400m, I2400M_RT_BUS);
 		goto error;
 	}
 	msleep(20);	/* device still needs some time or it drops it */
 	result = i2400m_tx(i2400m, skb->data, skb->len, I2400M_PT_DATA);
-	netif_wake_queue(i2400m->wimax_dev.net_dev);
 error:
+	netif_wake_queue(net_dev);
+out_kfree:
 	kfree_skb(skb);	/* refcount transferred by _hard_start_xmit() */
 out_put:
 	i2400m_put(i2400m);
@@ -229,6 +226,38 @@ void i2400m_tx_prep_header(struct sk_buff *skb)
 }
 
 
+
+/*
+ * Cleanup resources acquired during i2400m_net_wake_tx()
+ *
+ * This is called by __i2400m_dev_stop and means we have to make sure
+ * the workqueue is flushed from any pending work.
+ */
+void i2400m_net_wake_stop(struct i2400m *i2400m)
+{
+	struct device *dev = i2400m_dev(i2400m);
+
+	d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+	/* See i2400m_hard_start_xmit(), references are taken there
+	 * and here we release them if the work was still
+	 * pending. Note we can't differentiate work not pending vs
+	 * never scheduled, so the NULL check does that. */
+	if (cancel_work_sync(&i2400m->wake_tx_ws) == 0
+	    && i2400m->wake_tx_skb != NULL) {
+		unsigned long flags;
+		struct sk_buff *wake_tx_skb;
+		spin_lock_irqsave(&i2400m->tx_lock, flags);
+		wake_tx_skb = i2400m->wake_tx_skb;	/* compat help */
+		i2400m->wake_tx_skb = NULL;	/* compat help */
+		spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+		i2400m_put(i2400m);
+		kfree_skb(wake_tx_skb);
+	}
+	d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+	return;
+}
+
+
 /*
  * TX an skb to an idle device
  *
@@ -342,6 +371,20 @@ netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
 	int result;
 
 	d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
+	if (skb_header_cloned(skb)) {
+		/*
+		 * Make tcpdump/wireshark happy -- if they are
+		 * running, the skb is cloned and we will overwrite
+		 * the mac fields in i2400m_tx_prep_header. Expand
+		 * seems to fix this...
+		 */
+		result = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+		if (result) {
+			result = NETDEV_TX_BUSY;
+			goto error_expand;
+		}
+	}
+
 	if (i2400m->state == I2400M_SS_IDLE)
 		result = i2400m_net_wake_tx(i2400m, net_dev, skb);
 	else
@@ -352,10 +395,11 @@ netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
 		net_dev->stats.tx_packets++;
 		net_dev->stats.tx_bytes += skb->len;
 	}
+	result = NETDEV_TX_OK;
+error_expand:
 	kfree_skb(skb);
-
-	d_fnend(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
-	return NETDEV_TX_OK;
+	d_fnend(3, dev, "(skb %p net_dev %p) = %d\n", skb, net_dev, result);
+	return result;
 }
 
 
@@ -559,6 +603,22 @@ static const struct net_device_ops i2400m_netdev_ops = {
 	.ndo_change_mtu = i2400m_change_mtu,
 };
 
+static void i2400m_get_drvinfo(struct net_device *net_dev,
+			       struct ethtool_drvinfo *info)
+{
+	struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+
+	strncpy(info->driver, KBUILD_MODNAME, sizeof(info->driver) - 1);
+	strncpy(info->fw_version, i2400m->fw_name, sizeof(info->fw_version) - 1);
+	if (net_dev->dev.parent)
+		strncpy(info->bus_info, dev_name(net_dev->dev.parent),
+			sizeof(info->bus_info) - 1);
+}
+
+static const struct ethtool_ops i2400m_ethtool_ops = {
+	.get_drvinfo = i2400m_get_drvinfo,
+	.get_link = ethtool_op_get_link,
+};
 
 /**
  * i2400m_netdev_setup - Setup setup @net_dev's i2400m private data
@@ -580,6 +640,7 @@ void i2400m_netdev_setup(struct net_device *net_dev)
 		   & ~IFF_MULTICAST);
 	net_dev->watchdog_timeo = I2400M_TX_TIMEOUT;
 	net_dev->netdev_ops = &i2400m_netdev_ops;
+	net_dev->ethtool_ops = &i2400m_ethtool_ops;
 	d_fnend(3, NULL, "(net_dev %p) = void\n", net_dev);
 }
 EXPORT_SYMBOL_GPL(i2400m_netdev_setup);

drivers/net/wimax/i2400m/rx.c

@@ -158,30 +158,104 @@ struct i2400m_report_hook_args {
 	struct sk_buff *skb_rx;
 	const struct i2400m_l3l4_hdr *l3l4_hdr;
 	size_t size;
+	struct list_head list_node;
 };
 
 
 /*
  * Execute i2400m_report_hook in a workqueue
  *
- * Unpacks arguments from the deferred call, executes it and then
- * drops the references.
+ * Goes over the list of queued reports in i2400m->rx_reports and
+ * processes them.
  *
- * Obvious NOTE: References are needed because we are a separate
- *     thread; otherwise the buffer changes under us because it is
- *     released by the original caller.
+ * NOTE: refcounts on i2400m are not needed because we flush the
+ *     workqueue this runs on (i2400m->work_queue) before destroying
+ *     i2400m.
  */
-static
 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;
-	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);
+	struct i2400m *i2400m = container_of(ws, struct i2400m, rx_report_ws);
+	struct device *dev = i2400m_dev(i2400m);
+	struct i2400m_report_hook_args *args, *args_next;
+	LIST_HEAD(list);
+	unsigned long flags;
+
+	while (1) {
+		spin_lock_irqsave(&i2400m->rx_lock, flags);
+		list_splice_init(&i2400m->rx_reports, &list);
+		spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+		if (list_empty(&list))
+			break;
+		else
+			d_printf(1, dev, "processing queued reports\n");
+		list_for_each_entry_safe(args, args_next, &list, list_node) {
+			d_printf(2, dev, "processing queued report %p\n", args);
+			i2400m_report_hook(i2400m, args->l3l4_hdr, args->size);
+			kfree_skb(args->skb_rx);
+			list_del(&args->list_node);
+			kfree(args);
+		}
+	}
+}
+
+
+/*
+ * Flush the list of queued reports
+ */
+static
+void i2400m_report_hook_flush(struct i2400m *i2400m)
+{
+	struct device *dev = i2400m_dev(i2400m);
+	struct i2400m_report_hook_args *args, *args_next;
+	LIST_HEAD(list);
+	unsigned long flags;
+
+	d_printf(1, dev, "flushing queued reports\n");
+	spin_lock_irqsave(&i2400m->rx_lock, flags);
+	list_splice_init(&i2400m->rx_reports, &list);
+	spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+	list_for_each_entry_safe(args, args_next, &list, list_node) {
+		d_printf(2, dev, "flushing queued report %p\n", args);
+		kfree_skb(args->skb_rx);
+		list_del(&args->list_node);
+		kfree(args);
+	}
+}
+
+
+/*
+ * Queue a report for later processing
+ *
+ * @i2400m: device descriptor
+ * @skb_rx: skb that contains the payload (for reference counting)
+ * @l3l4_hdr: pointer to the control
+ * @size: size of the message
+ */
+static
+void i2400m_report_hook_queue(struct i2400m *i2400m, struct sk_buff *skb_rx,
+			      const void *l3l4_hdr, size_t size)
+{
+	struct device *dev = i2400m_dev(i2400m);
+	unsigned long flags;
+	struct i2400m_report_hook_args *args;
+
+	args = kzalloc(sizeof(*args), GFP_NOIO);
+	if (args) {
+		args->skb_rx = skb_get(skb_rx);
+		args->l3l4_hdr = l3l4_hdr;
+		args->size = size;
+		spin_lock_irqsave(&i2400m->rx_lock, flags);
+		list_add_tail(&args->list_node, &i2400m->rx_reports);
+		spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+		d_printf(2, dev, "queued report %p\n", args);
+		rmb();		/* see i2400m->ready's documentation  */
+		if (likely(i2400m->ready))	/* only send if up */
+			queue_work(i2400m->work_queue, &i2400m->rx_report_ws);
+	} else  {
+		if (printk_ratelimit())
+			dev_err(dev, "%s:%u: Can't allocate %zu B\n",
+				__func__, __LINE__, sizeof(*args));
+	}
 }
 
 
@@ -295,21 +369,29 @@ void i2400m_rx_ctl(struct i2400m *i2400m, struct sk_buff *skb_rx,
 		 msg_type, size);
 	d_dump(2, dev, l3l4_hdr, size);
 	if (msg_type & I2400M_MT_REPORT_MASK) {
-		/* These hooks have to be ran serialized; as well, the
-		 * handling might force the execution of commands, and
-		 * that might cause reentrancy issues with
-		 * bus-specific subdrivers and workqueues. So we run
-		 * it in a separate workqueue. */
-		struct i2400m_report_hook_args args = {
-			.skb_rx = skb_rx,
-			.l3l4_hdr = l3l4_hdr,
-			.size = size
-		};
-		if (unlikely(i2400m->ready == 0))	/* only send if up */
-			return;
-		skb_get(skb_rx);
-		i2400m_queue_work(i2400m, i2400m_report_hook_work,
-				  GFP_KERNEL, &args, sizeof(args));
+		/*
+		 * Process each report
+		 *
+		 * - has to be ran serialized as well
+		 *
+		 * - the handling might force the execution of
+		 *   commands. That might cause reentrancy issues with
+		 *   bus-specific subdrivers and workqueues, so the we
+		 *   run it in a separate workqueue.
+		 *
+		 * - when the driver is not yet ready to handle them,
+		 *   they are queued and at some point the queue is
+		 *   restarted [NOTE: we can't queue SKBs directly, as
+		 *   this might be a piece of a SKB, not the whole
+		 *   thing, and this is cheaper than cloning the
+		 *   SKB].
+		 *
+		 * Note we don't do refcounting for the device
+		 * structure; this is because before destroying
+		 * 'i2400m', we make sure to flush the
+		 * i2400m->work_queue, so there are no issues.
+		 */
+		i2400m_report_hook_queue(i2400m, skb_rx, l3l4_hdr, size);
 		if (unlikely(i2400m->trace_msg_from_user))
 			wimax_msg(&i2400m->wimax_dev, "echo",
 				  l3l4_hdr, size, GFP_KERNEL);
@@ -363,8 +445,6 @@ void i2400m_rx_trace(struct i2400m *i2400m,
 		 msg_type & I2400M_MT_REPORT_MASK ? "REPORT" : "CMD/SET/GET",
 		 msg_type, size);
 	d_dump(2, dev, l3l4_hdr, size);
-	if (unlikely(i2400m->ready == 0))	/* only send if up */
-		return;
 	result = wimax_msg(wimax_dev, "trace", l3l4_hdr, size, GFP_KERNEL);
 	if (result < 0)
 		dev_err(dev, "error sending trace to userspace: %d\n",
@@ -748,7 +828,7 @@ void i2400m_roq_queue(struct i2400m *i2400m, struct i2400m_roq *roq,
 		dev_err(dev, "SW BUG? queue nsn %d (lbn %u ws %u)\n",
 			nsn, lbn, roq->ws);
 		i2400m_roq_log_dump(i2400m, roq);
-		i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+		i2400m_reset(i2400m, I2400M_RT_WARM);
 	} else {
 		__i2400m_roq_queue(i2400m, roq, skb, lbn, nsn);
 		i2400m_roq_log_add(i2400m, roq, I2400M_RO_TYPE_PACKET,
@@ -814,7 +894,7 @@ void i2400m_roq_queue_update_ws(struct i2400m *i2400m, struct i2400m_roq *roq,
 		dev_err(dev, "SW BUG? queue_update_ws nsn %u (sn %u ws %u)\n",
 			nsn, sn, roq->ws);
 		i2400m_roq_log_dump(i2400m, roq);
-		i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+		i2400m_reset(i2400m, I2400M_RT_WARM);
 	} else {
 		/* if the queue is empty, don't bother as we'd queue
 		 * it and inmediately unqueue it -- just deliver it */
@@ -1194,6 +1274,28 @@ int i2400m_rx(struct i2400m *i2400m, struct sk_buff *skb)
 EXPORT_SYMBOL_GPL(i2400m_rx);
 
 
+void i2400m_unknown_barker(struct i2400m *i2400m,
+			   const void *buf, size_t size)
+{
+	struct device *dev = i2400m_dev(i2400m);
+	char prefix[64];
+	const __le32 *barker = buf;
+	dev_err(dev, "RX: HW BUG? unknown barker %08x, "
+		"dropping %zu bytes\n", le32_to_cpu(*barker), size);
+	snprintf(prefix, sizeof(prefix), "%s %s: ",
+		 dev_driver_string(dev), dev_name(dev));
+	if (size > 64) {
+		print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
+			       8, 4, buf, 64, 0);
+		printk(KERN_ERR "%s... (only first 64 bytes "
+		       "dumped)\n", prefix);
+	} else
+		print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
+			       8, 4, buf, size, 0);
+}
+EXPORT_SYMBOL(i2400m_unknown_barker);
+
+
 /*
  * Initialize the RX queue and infrastructure
  *
@@ -1261,4 +1363,6 @@ void i2400m_rx_release(struct i2400m *i2400m)
 		kfree(i2400m->rx_roq[0].log);
 		kfree(i2400m->rx_roq);
 	}
+	/* at this point, nothing can be received... */
+	i2400m_report_hook_flush(i2400m);
 }

drivers/net/wimax/i2400m/sdio-fw.c

@@ -118,7 +118,8 @@ ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *i2400m,
 	if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
 		goto error_too_big;
 
-	memcpy(i2400m->bm_cmd_buf, _cmd, cmd_size);	/* Prep command */
+	if (_cmd != i2400m->bm_cmd_buf)
+		memmove(i2400m->bm_cmd_buf, _cmd, cmd_size);
 	cmd = i2400m->bm_cmd_buf;
 	if (cmd_size_a > cmd_size)			/* Zero pad space */
 		memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
@@ -177,10 +178,6 @@ ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *i2400m,
 	d_fnstart(5, dev, "(i2400m %p ack %p size %zu)\n",
 		  i2400m, ack, ack_size);
 
-	spin_lock(&i2400m->rx_lock);
-	i2400ms->bm_ack_size = -EINPROGRESS;
-	spin_unlock(&i2400m->rx_lock);
-
 	result = wait_event_timeout(i2400ms->bm_wfa_wq,
 				    i2400ms->bm_ack_size != -EINPROGRESS,
 				    2 * HZ);
@@ -199,6 +196,10 @@ ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *i2400m,
 		size = min(ack_size, i2400ms->bm_ack_size);
 		memcpy(ack, i2400m->bm_ack_buf, size);
 	}
+	/*
+	 * Remember always to clear the bm_ack_size to -EINPROGRESS
+	 * after the RX data is processed
+	 */
 	i2400ms->bm_ack_size = -EINPROGRESS;
 	spin_unlock(&i2400m->rx_lock);
 

drivers/net/wimax/i2400m/sdio-rx.c

@@ -53,6 +53,7 @@
  * i2400ms_irq()
  *   i2400ms_rx()
  *     __i2400ms_rx_get_size()
+ *     i2400m_is_boot_barker()
  *     i2400m_rx()
  *
  * i2400ms_rx_setup()
@@ -138,6 +139,11 @@ void i2400ms_rx(struct i2400ms *i2400ms)
 		ret = rx_size;
 		goto error_get_size;
 	}
+	/*
+	 * Hardware quirk: make sure to clear the INTR status register
+	 * AFTER getting the data transfer size.
+	 */
+	sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret);
 
 	ret = -ENOMEM;
 	skb = alloc_skb(rx_size, GFP_ATOMIC);
@@ -153,25 +159,34 @@ void i2400ms_rx(struct i2400ms *i2400ms)
 	}
 
 	rmb();	/* make sure we get boot_mode from dev_reset_handle */
-	if (i2400m->boot_mode == 1) {
+	if (unlikely(i2400m->boot_mode == 1)) {
 		spin_lock(&i2400m->rx_lock);
 		i2400ms->bm_ack_size = rx_size;
 		spin_unlock(&i2400m->rx_lock);
 		memcpy(i2400m->bm_ack_buf, skb->data, rx_size);
 		wake_up(&i2400ms->bm_wfa_wq);
-		dev_err(dev, "RX: SDIO boot mode message\n");
+		d_printf(5, dev, "RX: SDIO boot mode message\n");
 		kfree_skb(skb);
-	} else if (unlikely(!memcmp(skb->data, i2400m_NBOOT_BARKER,
-				    sizeof(i2400m_NBOOT_BARKER))
-			    || !memcmp(skb->data, i2400m_SBOOT_BARKER,
-				       sizeof(i2400m_SBOOT_BARKER)))) {
-		ret = i2400m_dev_reset_handle(i2400m);
+		goto out;
+	}
+	ret = -EIO;
+	if (unlikely(rx_size < sizeof(__le32))) {
+		dev_err(dev, "HW BUG? only %zu bytes received\n", rx_size);
+		goto error_bad_size;
+	}
+	if (likely(i2400m_is_d2h_barker(skb->data))) {
+		skb_put(skb, rx_size);
+		i2400m_rx(i2400m, skb);
+	} else if (unlikely(i2400m_is_boot_barker(i2400m,
+						  skb->data, rx_size))) {
+		ret = i2400m_dev_reset_handle(i2400m, "device rebooted");
 		dev_err(dev, "RX: SDIO reboot barker\n");
 		kfree_skb(skb);
 	} else {
-		skb_put(skb, rx_size);
-		i2400m_rx(i2400m, skb);
+		i2400m_unknown_barker(i2400m, skb->data, rx_size);
+		kfree_skb(skb);
 	}
+out:
 	d_fnend(7, dev, "(i2400ms %p) = void\n", i2400ms);
 	return;
 
@@ -179,6 +194,7 @@ void i2400ms_rx(struct i2400ms *i2400ms)
 	kfree_skb(skb);
 error_alloc_skb:
 error_get_size:
+error_bad_size:
 	d_fnend(7, dev, "(i2400ms %p) = %d\n", i2400ms, ret);
 	return;
 }
@@ -209,7 +225,6 @@ void i2400ms_irq(struct sdio_func *func)
 		dev_err(dev, "RX: BUG? got IRQ but no interrupt ready?\n");
 		goto error_no_irq;
 	}
-	sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret);
 	i2400ms_rx(i2400ms);
 error_no_irq:
 	d_fnend(6, dev, "(i2400ms %p) = void\n", i2400ms);
@@ -234,6 +249,13 @@ int i2400ms_rx_setup(struct i2400ms *i2400ms)
 	init_waitqueue_head(&i2400ms->bm_wfa_wq);
 	spin_lock(&i2400m->rx_lock);
 	i2400ms->bm_wait_result = -EINPROGRESS;
+	/*
+	 * Before we are about to enable the RX interrupt, make sure
+	 * bm_ack_size is cleared to -EINPROGRESS which indicates
+	 * no RX interrupt happened yet or the previous interrupt
+	 * has been handled, we are ready to take the new interrupt
+	 */
+	i2400ms->bm_ack_size = -EINPROGRESS;
 	spin_unlock(&i2400m->rx_lock);
 
 	sdio_claim_host(func);

drivers/net/wimax/i2400m/sdio-tx.c

@@ -149,5 +149,8 @@ int i2400ms_tx_setup(struct i2400ms *i2400ms)
 
 void i2400ms_tx_release(struct i2400ms *i2400ms)
 {
-	destroy_workqueue(i2400ms->tx_workqueue);
+	if (i2400ms->tx_workqueue) {
+		destroy_workqueue(i2400ms->tx_workqueue);
+		i2400ms->tx_workqueue = NULL;
+	}
 }

drivers/net/wimax/i2400m/tx.c

@@ -310,7 +310,7 @@ size_t __i2400m_tx_tail_room(struct i2400m *i2400m)
 	size_t tail_room;
 	size_t tx_in;
 
-	if (unlikely(i2400m->tx_in) == 0)
+	if (unlikely(i2400m->tx_in == 0))
 		return I2400M_TX_BUF_SIZE;
 	tx_in = i2400m->tx_in % I2400M_TX_BUF_SIZE;
 	tail_room = I2400M_TX_BUF_SIZE - tx_in;
@@ -642,6 +642,9 @@ int i2400m_tx(struct i2400m *i2400m, const void *buf, size_t buf_len,
 	 * current one is out of payload slots or we have a singleton,
 	 * close it and start a new one */
 	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	result = -ESHUTDOWN;
+	if (i2400m->tx_buf == NULL)
+		goto error_tx_new;
 try_new:
 	if (unlikely(i2400m->tx_msg == NULL))
 		i2400m_tx_new(i2400m);
@@ -697,7 +700,10 @@ int i2400m_tx(struct i2400m *i2400m, const void *buf, size_t buf_len,
 	}
 error_tx_new:
 	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-	i2400m->bus_tx_kick(i2400m);	/* always kick, might free up space */
+	/* kick in most cases, except when the TX subsys is down, as
+	 * it might free space */
+	if (likely(result != -ESHUTDOWN))
+		i2400m->bus_tx_kick(i2400m);
 	d_fnend(3, dev, "(i2400m %p skb %p [%zu bytes] pt %u) = %d\n",
 		i2400m, buf, buf_len, pl_type, result);
 	return result;
@@ -740,6 +746,9 @@ struct i2400m_msg_hdr *i2400m_tx_msg_get(struct i2400m *i2400m,
 
 	d_fnstart(3, dev, "(i2400m %p bus_size %p)\n", i2400m, bus_size);
 	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	tx_msg_moved = NULL;
+	if (i2400m->tx_buf == NULL)
+		goto out_unlock;
 skip:
 	tx_msg_moved = NULL;
 	if (i2400m->tx_in == i2400m->tx_out) {	/* Empty FIFO? */
@@ -829,6 +838,8 @@ void i2400m_tx_msg_sent(struct i2400m *i2400m)
 
 	d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
 	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	if (i2400m->tx_buf == NULL)
+		goto out_unlock;
 	i2400m->tx_out += i2400m->tx_msg_size;
 	d_printf(2, dev, "TX: sent %zu b\n", (size_t) i2400m->tx_msg_size);
 	i2400m->tx_msg_size = 0;
@@ -837,6 +848,7 @@ void i2400m_tx_msg_sent(struct i2400m *i2400m)
 	n = i2400m->tx_out / I2400M_TX_BUF_SIZE;
 	i2400m->tx_out %= I2400M_TX_BUF_SIZE;
 	i2400m->tx_in -= n * I2400M_TX_BUF_SIZE;
+out_unlock:
 	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
 	d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
 }
@@ -876,5 +888,9 @@ int i2400m_tx_setup(struct i2400m *i2400m)
  */
 void i2400m_tx_release(struct i2400m *i2400m)
 {
+	unsigned long flags;
+	spin_lock_irqsave(&i2400m->tx_lock, flags);
 	kfree(i2400m->tx_buf);
+	i2400m->tx_buf = NULL;
+	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
 }

drivers/net/wimax/i2400m/usb-fw.c

@@ -99,10 +99,10 @@ ssize_t i2400mu_tx_bulk_out(struct i2400mu *i2400mu, void *buf, size_t buf_size)
 		dev_err(dev, "BM-CMD: can't get autopm: %d\n", result);
 		do_autopm = 0;
 	}
-	epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_BULK_OUT);
+	epd = usb_get_epd(i2400mu->usb_iface, i2400mu->endpoint_cfg.bulk_out);
 	pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
 retry:
-	result = usb_bulk_msg(i2400mu->usb_dev, pipe, buf, buf_size, &len, HZ);
+	result = usb_bulk_msg(i2400mu->usb_dev, pipe, buf, buf_size, &len, 200);
 	switch (result) {
 	case 0:
 		if (len != buf_size) {
@@ -113,6 +113,28 @@ ssize_t i2400mu_tx_bulk_out(struct i2400mu *i2400mu, void *buf, size_t buf_size)
 		}
 		result = len;
 		break;
+	case -EPIPE:
+		/*
+		 * Stall -- maybe the device is choking with our
+		 * requests. Clear it and give it some time. If they
+		 * happen to often, it might be another symptom, so we
+		 * reset.
+		 *
+		 * No error handling for usb_clear_halt(0; if it
+		 * works, the retry works; if it fails, this switch
+		 * does the error handling for us.
+		 */
+		if (edc_inc(&i2400mu->urb_edc,
+			    10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
+			dev_err(dev, "BM-CMD: too many stalls in "
+				"URB; resetting device\n");
+			usb_queue_reset_device(i2400mu->usb_iface);
+			/* fallthrough */
+		} else {
+			usb_clear_halt(i2400mu->usb_dev, pipe);
+			msleep(10);	/* give the device some time */
+			goto retry;
+		}
 	case -EINVAL:			/* while removing driver */
 	case -ENODEV:			/* dev disconnect ... */
 	case -ENOENT:			/* just ignore it */
@@ -135,7 +157,6 @@ ssize_t i2400mu_tx_bulk_out(struct i2400mu *i2400mu, void *buf, size_t buf_size)
 			result);
 		goto retry;
 	}
-	result = len;
 	if (do_autopm)
 		usb_autopm_put_interface(i2400mu->usb_iface);
 	return result;
@@ -172,7 +193,8 @@ ssize_t i2400mu_bus_bm_cmd_send(struct i2400m *i2400m,
 	result = -E2BIG;
 	if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
 		goto error_too_big;
-	memcpy(i2400m->bm_cmd_buf, _cmd, cmd_size);
+	if (_cmd != i2400m->bm_cmd_buf)
+		memmove(i2400m->bm_cmd_buf, _cmd, cmd_size);
 	cmd = i2400m->bm_cmd_buf;
 	if (cmd_size_a > cmd_size)			/* Zero pad space */
 		memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
@@ -226,7 +248,8 @@ int i2400mu_notif_submit(struct i2400mu *i2400mu, struct urb *urb,
 	struct usb_endpoint_descriptor *epd;
 	int pipe;
 
-	epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_NOTIFICATION);
+	epd = usb_get_epd(i2400mu->usb_iface,
+			  i2400mu->endpoint_cfg.notification);
 	pipe = usb_rcvintpipe(i2400mu->usb_dev, epd->bEndpointAddress);
 	usb_fill_int_urb(urb, i2400mu->usb_dev, pipe,
 			 i2400m->bm_ack_buf, I2400M_BM_ACK_BUF_SIZE,
@@ -328,8 +351,8 @@ ssize_t i2400mu_bus_bm_wait_for_ack(struct i2400m *i2400m,
 out:
 	if (do_autopm)
 		usb_autopm_put_interface(i2400mu->usb_iface);
-	d_fnend(8, dev, "(i2400m %p ack %p size %zu) = %zd\n",
-		i2400m, ack, ack_size, result);
+	d_fnend(8, dev, "(i2400m %p ack %p size %zu) = %ld\n",
+		i2400m, ack, ack_size, (long) result);
 	return result;
 
 error_exceeded:

drivers/net/wimax/i2400m/usb-notif.c

@@ -51,6 +51,7 @@
  *
  * i2400mu_usb_notification_cb()	Called when a URB is ready
  *   i2400mu_notif_grok()
+ *     i2400m_is_boot_barker()
  *     i2400m_dev_reset_handle()
  *     i2400mu_rx_kick()
  */
@@ -87,32 +88,21 @@ int i2400mu_notification_grok(struct i2400mu *i2400mu, const void *buf,
 	d_fnstart(4, dev, "(i2400m %p buf %p buf_len %zu)\n",
 		  i2400mu, buf, buf_len);
 	ret = -EIO;
-	if (buf_len < sizeof(i2400m_NBOOT_BARKER))
+	if (buf_len < sizeof(i2400m_ZERO_BARKER))
 		/* Not a bug, just ignore */
 		goto error_bad_size;
-	if (!memcmp(i2400m_NBOOT_BARKER, buf, sizeof(i2400m_NBOOT_BARKER))
-	    || !memcmp(i2400m_SBOOT_BARKER, buf, sizeof(i2400m_SBOOT_BARKER)))
-		ret = i2400m_dev_reset_handle(i2400m);
-	else if (!memcmp(i2400m_ZERO_BARKER, buf, sizeof(i2400m_ZERO_BARKER))) {
+	ret = 0;
+	if (!memcmp(i2400m_ZERO_BARKER, buf, sizeof(i2400m_ZERO_BARKER))) {
 		i2400mu_rx_kick(i2400mu);
-		ret = 0;
-	} else {	/* Unknown or unexpected data in the notif message */
-		char prefix[64];
-		ret = -EIO;
-		dev_err(dev, "HW BUG? Unknown/unexpected data in notification "
-			"message (%zu bytes)\n", buf_len);
-		snprintf(prefix, sizeof(prefix), "%s %s: ",
-			 dev_driver_string(dev), dev_name(dev));
-		if (buf_len > 64) {
-			print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
-				       8, 4, buf, 64, 0);
-			printk(KERN_ERR "%s... (only first 64 bytes "
-			       "dumped)\n", prefix);
-		} else
-			print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
-				       8, 4, buf, buf_len, 0);
+		goto out;
 	}
+	ret = i2400m_is_boot_barker(i2400m, buf, buf_len);
+	if (unlikely(ret >= 0))
+		ret = i2400m_dev_reset_handle(i2400m, "device rebooted");
+	else	/* Unknown or unexpected data in the notif message */
+		i2400m_unknown_barker(i2400m, buf, buf_len);
 error_bad_size:
+out:
 	d_fnend(4, dev, "(i2400m %p buf %p buf_len %zu) = %d\n",
 		i2400mu, buf, buf_len, ret);
 	return ret;
@@ -220,7 +210,8 @@ int i2400mu_notification_setup(struct i2400mu *i2400mu)
 		dev_err(dev, "notification: cannot allocate URB\n");
 		goto error_alloc_urb;
 	}
-	epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_NOTIFICATION);
+	epd = usb_get_epd(i2400mu->usb_iface,
+			  i2400mu->endpoint_cfg.notification);
 	usb_pipe = usb_rcvintpipe(i2400mu->usb_dev, epd->bEndpointAddress);
 	usb_fill_int_urb(i2400mu->notif_urb, i2400mu->usb_dev, usb_pipe,
 			 buf, I2400MU_MAX_NOTIFICATION_LEN,

drivers/net/wimax/i2400m/usb-rx.c

@@ -204,7 +204,7 @@ struct sk_buff *i2400mu_rx(struct i2400mu *i2400mu, struct sk_buff *rx_skb)
 		dev_err(dev, "RX: can't get autopm: %d\n", result);
 		do_autopm = 0;
 	}
-	epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_BULK_IN);
+	epd = usb_get_epd(i2400mu->usb_iface, i2400mu->endpoint_cfg.bulk_in);
 	usb_pipe = usb_rcvbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
 retry:
 	rx_size = skb_end_pointer(rx_skb) - rx_skb->data - rx_skb->len;
@@ -214,7 +214,7 @@ struct sk_buff *i2400mu_rx(struct i2400mu *i2400mu, struct sk_buff *rx_skb)
 	}
 	result = usb_bulk_msg(
 		i2400mu->usb_dev, usb_pipe, rx_skb->data + rx_skb->len,
-		rx_size, &read_size, HZ);
+		rx_size, &read_size, 200);
 	usb_mark_last_busy(i2400mu->usb_dev);
 	switch (result) {
 	case 0:
@@ -222,6 +222,26 @@ struct sk_buff *i2400mu_rx(struct i2400mu *i2400mu, struct sk_buff *rx_skb)
 			goto retry;	/* ZLP, just resubmit */
 		skb_put(rx_skb, read_size);
 		break;
+	case -EPIPE:
+		/*
+		 * Stall -- maybe the device is choking with our
+		 * requests. Clear it and give it some time. If they
+		 * happen to often, it might be another symptom, so we
+		 * reset.
+		 *
+		 * No error handling for usb_clear_halt(0; if it
+		 * works, the retry works; if it fails, this switch
+		 * does the error handling for us.
+		 */
+		if (edc_inc(&i2400mu->urb_edc,
+			    10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
+			dev_err(dev, "BM-CMD: too many stalls in "
+				"URB; resetting device\n");
+			goto do_reset;
+		}
+		usb_clear_halt(i2400mu->usb_dev, usb_pipe);
+		msleep(10);	/* give the device some time */
+		goto retry;
 	case -EINVAL:			/* while removing driver */
 	case -ENODEV:			/* dev disconnect ... */
 	case -ENOENT:			/* just ignore it */
@@ -283,6 +303,7 @@ struct sk_buff *i2400mu_rx(struct i2400mu *i2400mu, struct sk_buff *rx_skb)
 error_reset:
 	dev_err(dev, "RX: maximum errors in URB exceeded; "
 		"resetting device\n");
+do_reset:
 	usb_queue_reset_device(i2400mu->usb_iface);
 	rx_skb = ERR_PTR(result);
 	goto out;
@@ -316,10 +337,15 @@ int i2400mu_rxd(void *_i2400mu)
 	size_t pending;
 	int rx_size;
 	struct sk_buff *rx_skb;
+	unsigned long flags;
 
 	d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
+	spin_lock_irqsave(&i2400m->rx_lock, flags);
+	BUG_ON(i2400mu->rx_kthread != NULL);
+	i2400mu->rx_kthread = current;
+	spin_unlock_irqrestore(&i2400m->rx_lock, flags);
 	while (1) {
-		d_printf(2, dev, "TX: waiting for messages\n");
+		d_printf(2, dev, "RX: waiting for messages\n");
 		pending = 0;
 		wait_event_interruptible(
 			i2400mu->rx_wq,
@@ -367,6 +393,9 @@ int i2400mu_rxd(void *_i2400mu)
 	}
 	result = 0;
 out:
+	spin_lock_irqsave(&i2400m->rx_lock, flags);
+	i2400mu->rx_kthread = NULL;
+	spin_unlock_irqrestore(&i2400m->rx_lock, flags);
 	d_fnend(4, dev, "(i2400mu %p) = %d\n", i2400mu, result);
 	return result;
 
@@ -403,18 +432,33 @@ int i2400mu_rx_setup(struct i2400mu *i2400mu)
 	struct i2400m *i2400m = &i2400mu->i2400m;
 	struct device *dev = &i2400mu->usb_iface->dev;
 	struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+	struct task_struct *kthread;
 
-	i2400mu->rx_kthread = kthread_run(i2400mu_rxd, i2400mu, "%s-rx",
-					  wimax_dev->name);
-	if (IS_ERR(i2400mu->rx_kthread)) {
-		result = PTR_ERR(i2400mu->rx_kthread);
+	kthread = kthread_run(i2400mu_rxd, i2400mu, "%s-rx",
+			      wimax_dev->name);
+	/* the kthread function sets i2400mu->rx_thread */
+	if (IS_ERR(kthread)) {
+		result = PTR_ERR(kthread);
 		dev_err(dev, "RX: cannot start thread: %d\n", result);
 	}
 	return result;
 }
 
+
 void i2400mu_rx_release(struct i2400mu *i2400mu)
 {
-	kthread_stop(i2400mu->rx_kthread);
+	unsigned long flags;
+	struct i2400m *i2400m = &i2400mu->i2400m;
+	struct device *dev = i2400m_dev(i2400m);
+	struct task_struct *kthread;
+
+	spin_lock_irqsave(&i2400m->rx_lock, flags);
+	kthread = i2400mu->rx_kthread;
+	i2400mu->rx_kthread = NULL;
+	spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+	if (kthread)
+		kthread_stop(kthread);
+	else
+		d_printf(1, dev, "RX: kthread had already exited\n");
 }
 

drivers/net/wimax/i2400m/usb-tx.c

@@ -101,11 +101,11 @@ int i2400mu_tx(struct i2400mu *i2400mu, struct i2400m_msg_hdr *tx_msg,
 		dev_err(dev, "TX: can't get autopm: %d\n", result);
 		do_autopm = 0;
 	}
-	epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_BULK_OUT);
+	epd = usb_get_epd(i2400mu->usb_iface, i2400mu->endpoint_cfg.bulk_out);
 	usb_pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
 retry:
 	result = usb_bulk_msg(i2400mu->usb_dev, usb_pipe,
-			      tx_msg, tx_msg_size, &sent_size, HZ);
+			      tx_msg, tx_msg_size, &sent_size, 200);
 	usb_mark_last_busy(i2400mu->usb_dev);
 	switch (result) {
 	case 0:
@@ -115,6 +115,28 @@ int i2400mu_tx(struct i2400mu *i2400mu, struct i2400m_msg_hdr *tx_msg,
 			result = -EIO;
 		}
 		break;
+	case -EPIPE:
+		/*
+		 * Stall -- maybe the device is choking with our
+		 * requests. Clear it and give it some time. If they
+		 * happen to often, it might be another symptom, so we
+		 * reset.
+		 *
+		 * No error handling for usb_clear_halt(0; if it
+		 * works, the retry works; if it fails, this switch
+		 * does the error handling for us.
+		 */
+		if (edc_inc(&i2400mu->urb_edc,
+			    10 * EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
+			dev_err(dev, "BM-CMD: too many stalls in "
+				"URB; resetting device\n");
+			usb_queue_reset_device(i2400mu->usb_iface);
+			/* fallthrough */
+		} else {
+			usb_clear_halt(i2400mu->usb_dev, usb_pipe);
+			msleep(10);	/* give the device some time */
+			goto retry;
+		}
 	case -EINVAL:			/* while removing driver */
 	case -ENODEV:			/* dev disconnect ... */
 	case -ENOENT:			/* just ignore it */
@@ -161,9 +183,15 @@ int i2400mu_txd(void *_i2400mu)
 	struct device *dev = &i2400mu->usb_iface->dev;
 	struct i2400m_msg_hdr *tx_msg;
 	size_t tx_msg_size;
+	unsigned long flags;
 
 	d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
 
+	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	BUG_ON(i2400mu->tx_kthread != NULL);
+	i2400mu->tx_kthread = current;
+	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+
 	while (1) {
 		d_printf(2, dev, "TX: waiting for messages\n");
 		tx_msg = NULL;
@@ -183,6 +211,11 @@ int i2400mu_txd(void *_i2400mu)
 		if (result < 0)
 			break;
 	}
+
+	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	i2400mu->tx_kthread = NULL;
+	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+
 	d_fnend(4, dev, "(i2400mu %p) = %d\n", i2400mu, result);
 	return result;
 }
@@ -213,11 +246,13 @@ int i2400mu_tx_setup(struct i2400mu *i2400mu)
 	struct i2400m *i2400m = &i2400mu->i2400m;
 	struct device *dev = &i2400mu->usb_iface->dev;
 	struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+	struct task_struct *kthread;
 
-	i2400mu->tx_kthread = kthread_run(i2400mu_txd, i2400mu, "%s-tx",
-					  wimax_dev->name);
-	if (IS_ERR(i2400mu->tx_kthread)) {
-		result = PTR_ERR(i2400mu->tx_kthread);
+	kthread = kthread_run(i2400mu_txd, i2400mu, "%s-tx",
+			      wimax_dev->name);
+	/* the kthread function sets i2400mu->tx_thread */
+	if (IS_ERR(kthread)) {
+		result = PTR_ERR(kthread);
 		dev_err(dev, "TX: cannot start thread: %d\n", result);
 	}
 	return result;
@@ -225,5 +260,17 @@ int i2400mu_tx_setup(struct i2400mu *i2400mu)
 
 void i2400mu_tx_release(struct i2400mu *i2400mu)
 {
-	kthread_stop(i2400mu->tx_kthread);
+	unsigned long flags;
+	struct i2400m *i2400m = &i2400mu->i2400m;
+	struct device *dev = i2400m_dev(i2400m);
+	struct task_struct *kthread;
+
+	spin_lock_irqsave(&i2400m->tx_lock, flags);
+	kthread = i2400mu->tx_kthread;
+	i2400mu->tx_kthread = NULL;
+	spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+	if (kthread)
+		kthread_stop(kthread);
+	else
+		d_printf(1, dev, "TX: kthread had already exited\n");
 }

include/linux/mmc/sdio_ids.h

@@ -28,6 +28,7 @@
 #define SDIO_DEVICE_ID_INTEL_IWMC3200TOP	0x1404
 #define SDIO_DEVICE_ID_INTEL_IWMC3200GPS	0x1405
 #define SDIO_DEVICE_ID_INTEL_IWMC3200BT		0x1406
+#define SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX_2G5	0x1407
 
 #define SDIO_VENDOR_ID_MARVELL			0x02df
 #define SDIO_DEVICE_ID_MARVELL_LIBERTAS		0x9103

include/linux/wimax/debug.h

@@ -450,4 +450,76 @@ do {							\
 })
 
 
+static inline
+void d_submodule_set(struct d_level *d_level, size_t d_level_size,
+		     const char *submodule, u8 level, const char *tag)
+{
+	struct d_level *itr, *top;
+	int index = -1;
+
+	for (itr = d_level, top = itr + d_level_size; itr < top; itr++) {
+		index++;
+		if (itr->name == NULL) {
+			printk(KERN_ERR "%s: itr->name NULL?? (%p, #%d)\n",
+			       tag, itr, index);
+			continue;
+		}
+		if (!strcmp(itr->name, submodule)) {
+			itr->level = level;
+			return;
+		}
+	}
+	printk(KERN_ERR "%s: unknown submodule %s\n", tag, submodule);
+}
+
+
+/**
+ * d_parse_params - Parse a string with debug parameters from the
+ * command line
+ *
+ * @d_level: level structure (D_LEVEL)
+ * @d_level_size: number of items in the level structure
+ *     (D_LEVEL_SIZE).
+ * @_params: string with the parameters; this is a space (not tab!)
+ *     separated list of NAME:VALUE, where value is the debug level
+ *     and NAME is the name of the submodule.
+ * @tag: string for error messages (example: MODULE.ARGNAME).
+ */
+static inline
+void d_parse_params(struct d_level *d_level, size_t d_level_size,
+		    const char *_params, const char *tag)
+{
+	char submodule[130], *params, *params_orig, *token, *colon;
+	unsigned level, tokens;
+
+	if (_params == NULL)
+		return;
+	params_orig = kstrdup(_params, GFP_KERNEL);
+	params = params_orig;
+	while (1) {
+		token = strsep(&params, " ");
+		if (token == NULL)
+			break;
+		if (*token == '\0')	/* eat joint spaces */
+			continue;
+		/* kernel's sscanf %s eats until whitespace, so we
+		 * replace : by \n so it doesn't get eaten later by
+		 * strsep */
+		colon = strchr(token, ':');
+		if (colon != NULL)
+			*colon = '\n';
+		tokens = sscanf(token, "%s\n%u", submodule, &level);
+		if (colon != NULL)
+			*colon = ':';	/* set back, for error messages */
+		if (tokens == 2)
+			d_submodule_set(d_level, d_level_size,
+					submodule, level, tag);
+		else
+			printk(KERN_ERR "%s: can't parse '%s' as a "
+			       "SUBMODULE:LEVEL (%d tokens)\n",
+			       tag, token, tokens);
+	}
+	kfree(params_orig);
+}
+
 #endif /* #ifndef __debug__h__ */

include/linux/wimax/i2400m.h

@@ -138,7 +138,7 @@ struct i2400m_bcf_hdr {
 	__le32 module_id;
 	__le32 module_vendor;
 	__le32 date;		/* BCD YYYMMDD */
-	__le32 size;
+	__le32 size;            /* in dwords */
 	__le32 key_size;	/* in dwords */
 	__le32 modulus_size;	/* in dwords */
 	__le32 exponent_size;	/* in dwords */
@@ -168,16 +168,6 @@ enum i2400m_brh {
 };
 
 
-/* Constants for bcf->module_id */
-enum i2400m_bcf_mod_id {
-	/* Firmware file carries its own pokes -- pokes are a set of
-	 * magical values that have to be written in certain memory
-	 * addresses to get the device up and ready for firmware
-	 * download when it is in non-signed boot mode. */
-	I2400M_BCF_MOD_ID_POKES = 0x000000001,
-};
-
-
 /**
  * i2400m_bootrom_header - Header for a boot-mode command
  *
@@ -276,6 +266,7 @@ enum {
 	I2400M_WARM_RESET_BARKER = 0x50f750f7,
 	I2400M_NBOOT_BARKER = 0xdeadbeef,
 	I2400M_SBOOT_BARKER = 0x0ff1c1a1,
+	I2400M_SBOOT_BARKER_6050 = 0x80000001,
 	I2400M_ACK_BARKER = 0xfeedbabe,
 	I2400M_D2H_MSG_BARKER = 0xbeefbabe,
 };

include/net/wimax.h

@@ -195,6 +195,12 @@
  *    defining the `struct nla_policy` for each message, it has to have
  *    an array size of WIMAX_GNL_ATTR_MAX+1.
  *
+ * The op_*() function pointers will not be called if the wimax_dev is
+ * in a state <= %WIMAX_ST_UNINITIALIZED. The exception is:
+ *
+ * - op_reset: can be called at any time after wimax_dev_add() has
+ *   been called.
+ *
  * THE PIPE INTERFACE:
  *
  * This interface is kept intentionally simple. The driver can send

net/wimax/op-msg.c

@@ -388,6 +388,8 @@ int wimax_gnl_doit_msg_from_user(struct sk_buff *skb, struct genl_info *info)
 	}
 	mutex_lock(&wimax_dev->mutex);
 	result = wimax_dev_is_ready(wimax_dev);
+	if (result == -ENOMEDIUM)
+		result = 0;
 	if (result < 0)
 		goto error_not_ready;
 	result = -ENOSYS;

net/wimax/op-rfkill.c

@@ -305,8 +305,15 @@ int wimax_rfkill(struct wimax_dev *wimax_dev, enum wimax_rf_state state)
 	d_fnstart(3, dev, "(wimax_dev %p state %u)\n", wimax_dev, state);
 	mutex_lock(&wimax_dev->mutex);
 	result = wimax_dev_is_ready(wimax_dev);
-	if (result < 0)
+	if (result < 0) {
+		/* While initializing, < 1.4.3 wimax-tools versions use
+		 * this call to check if the device is a valid WiMAX
+		 * device; so we allow it to proceed always,
+		 * considering the radios are all off. */
+		if (result == -ENOMEDIUM && state == WIMAX_RF_QUERY)
+			result = WIMAX_RF_OFF << 1 | WIMAX_RF_OFF;
 		goto error_not_ready;
+	}
 	switch (state) {
 	case WIMAX_RF_ON:
 	case WIMAX_RF_OFF:
@@ -355,6 +362,7 @@ int wimax_rfkill_add(struct wimax_dev *wimax_dev)
 
 	wimax_dev->rfkill = rfkill;
 
+	rfkill_init_sw_state(rfkill, 1);
 	result = rfkill_register(wimax_dev->rfkill);
 	if (result < 0)
 		goto error_rfkill_register;

net/wimax/stack.c

@@ -60,6 +60,14 @@
 #define D_SUBMODULE stack
 #include "debug-levels.h"
 
+static char wimax_debug_params[128];
+module_param_string(debug, wimax_debug_params, sizeof(wimax_debug_params),
+		    0644);
+MODULE_PARM_DESC(debug,
+		 "String of space-separated NAME:VALUE pairs, where NAMEs "
+		 "are the different debug submodules and VALUE are the "
+		 "initial debug value to set.");
+
 /*
  * Authoritative source for the RE_STATE_CHANGE attribute policy
  *
@@ -562,6 +570,9 @@ int __init wimax_subsys_init(void)
 	int result, cnt;
 
 	d_fnstart(4, NULL, "()\n");
+	d_parse_params(D_LEVEL, D_LEVEL_SIZE, wimax_debug_params,
+		       "wimax.debug");
+
 	snprintf(wimax_gnl_family.name, sizeof(wimax_gnl_family.name),
 		 "WiMAX");
 	result = genl_register_family(&wimax_gnl_family);