Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/ieee1394/linux1394-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: core: ignore link-active bit of new nodes, fix device recognition
  firewire: sbp2: revert obsolete 'fix stall with "Unsolicited response"'
  firewire: core: increase default SPLIT_TIMEOUT value
  firewire: ohci: Misleading kfree in ohci.c::pci_probe/remove
  firewire: ohci: omit IntEvent.busReset check rom AT queueing
  firewire: ohci: prevent starting of iso contexts with empty queue
  firewire: ohci: prevent iso completion callbacks after context stop
  firewire: core: rename some variables
  firewire: nosy: should work on Power Mac G4 PCI too
  firewire: core: fix card->reset_jiffies overflow
  firewire: cdev: remove unneeded reference
  firewire: cdev: always wait for outbound transactions to complete
  firewire: cdev: remove unneeded idr_find() from complete_transaction()
  firewire: ohci: log dead DMA contexts

drivers/firewire/Kconfig

@@ -75,7 +75,8 @@ config FIREWIRE_NOSY
 	  The following cards are known to be based on PCILynx or PCILynx-2:
 	  IOI IOI-1394TT (PCI card), Unibrain Fireboard 400 PCI Lynx-2
 	  (PCI card), Newer Technology FireWire 2 Go (CardBus card),
-	  Apple Power Mac G3 blue & white (onboard controller).
+	  Apple Power Mac G3 blue & white and G4 with PCI graphics
+	  (onboard controller).
 
 	  To compile this driver as a module, say M here:  The module will be
 	  called nosy.  Source code of a userspace interface to nosy, called

drivers/firewire/core-card.c

@@ -75,6 +75,13 @@ static size_t config_rom_length = 1 + 4 + 1 + 1;
 #define BIB_IRMC		((1) << 31)
 #define NODE_CAPABILITIES	0x0c0083c0 /* per IEEE 1394 clause 8.3.2.6.5.2 */
 
+/*
+ * IEEE-1394 specifies a default SPLIT_TIMEOUT value of 800 cycles (100 ms),
+ * but we have to make it longer because there are many devices whose firmware
+ * is just too slow for that.
+ */
+#define DEFAULT_SPLIT_TIMEOUT	(2 * 8000)
+
 #define CANON_OUI		0x000085
 
 static void generate_config_rom(struct fw_card *card, __be32 *config_rom)
@@ -233,7 +240,7 @@ static void br_work(struct work_struct *work)
 
 	/* Delay for 2s after last reset per IEEE 1394 clause 8.2.1. */
 	if (card->reset_jiffies != 0 &&
-	    time_is_after_jiffies(card->reset_jiffies + 2 * HZ)) {
+	    time_before64(get_jiffies_64(), card->reset_jiffies + 2 * HZ)) {
 		if (!schedule_delayed_work(&card->br_work, 2 * HZ))
 			fw_card_put(card);
 		return;
@@ -316,7 +323,8 @@ static void bm_work(struct work_struct *work)
 	irm_id   = card->irm_node->node_id;
 	local_id = card->local_node->node_id;
 
-	grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 8));
+	grace = time_after64(get_jiffies_64(),
+			     card->reset_jiffies + DIV_ROUND_UP(HZ, 8));
 
 	if ((is_next_generation(generation, card->bm_generation) &&
 	     !card->bm_abdicate) ||
@@ -511,10 +519,11 @@ void fw_card_initialize(struct fw_card *card,
 	card->device = device;
 	card->current_tlabel = 0;
 	card->tlabel_mask = 0;
-	card->split_timeout_hi = 0;
-	card->split_timeout_lo = 800 << 19;
-	card->split_timeout_cycles = 800;
-	card->split_timeout_jiffies = DIV_ROUND_UP(HZ, 10);
+	card->split_timeout_hi = DEFAULT_SPLIT_TIMEOUT / 8000;
+	card->split_timeout_lo = (DEFAULT_SPLIT_TIMEOUT % 8000) << 19;
+	card->split_timeout_cycles = DEFAULT_SPLIT_TIMEOUT;
+	card->split_timeout_jiffies =
+			DIV_ROUND_UP(DEFAULT_SPLIT_TIMEOUT * HZ, 8000);
 	card->color = 0;
 	card->broadcast_channel = BROADCAST_CHANNEL_INITIAL;
 

drivers/firewire/core-cdev.c

@@ -64,6 +64,7 @@ struct client {
 	struct idr resource_idr;
 	struct list_head event_list;
 	wait_queue_head_t wait;
+	wait_queue_head_t tx_flush_wait;
 	u64 bus_reset_closure;
 
 	struct fw_iso_context *iso_context;
@@ -251,6 +252,7 @@ static int fw_device_op_open(struct inode *inode, struct file *file)
 	idr_init(&client->resource_idr);
 	INIT_LIST_HEAD(&client->event_list);
 	init_waitqueue_head(&client->wait);
+	init_waitqueue_head(&client->tx_flush_wait);
 	INIT_LIST_HEAD(&client->phy_receiver_link);
 	kref_init(&client->kref);
 
@@ -520,10 +522,6 @@ static int release_client_resource(struct client *client, u32 handle,
 static void release_transaction(struct client *client,
 				struct client_resource *resource)
 {
-	struct outbound_transaction_resource *r = container_of(resource,
-			struct outbound_transaction_resource, resource);
-
-	fw_cancel_transaction(client->device->card, &r->transaction);
 }
 
 static void complete_transaction(struct fw_card *card, int rcode,
@@ -540,22 +538,9 @@ static void complete_transaction(struct fw_card *card, int rcode,
 		memcpy(rsp->data, payload, rsp->length);
 
 	spin_lock_irqsave(&client->lock, flags);
-	/*
-	 * 1. If called while in shutdown, the idr tree must be left untouched.
-	 *    The idr handle will be removed and the client reference will be
-	 *    dropped later.
-	 * 2. If the call chain was release_client_resource ->
-	 *    release_transaction -> complete_transaction (instead of a normal
-	 *    conclusion of the transaction), i.e. if this resource was already
-	 *    unregistered from the idr, the client reference will be dropped
-	 *    by release_client_resource and we must not drop it here.
-	 */
-	if (!client->in_shutdown &&
-	    idr_find(&client->resource_idr, e->r.resource.handle)) {
-		idr_remove(&client->resource_idr, e->r.resource.handle);
-		/* Drop the idr's reference */
-		client_put(client);
-	}
+	idr_remove(&client->resource_idr, e->r.resource.handle);
+	if (client->in_shutdown)
+		wake_up(&client->tx_flush_wait);
 	spin_unlock_irqrestore(&client->lock, flags);
 
 	rsp->type = FW_CDEV_EVENT_RESPONSE;
@@ -575,7 +560,7 @@ static void complete_transaction(struct fw_card *card, int rcode,
 		queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
 			    NULL, 0);
 
-	/* Drop the transaction callback's reference */
+	/* Drop the idr's reference */
 	client_put(client);
 }
 
@@ -614,9 +599,6 @@ static int init_request(struct client *client,
 	if (ret < 0)
 		goto failed;
 
-	/* Get a reference for the transaction callback */
-	client_get(client);
-
 	fw_send_request(client->device->card, &e->r.transaction,
 			request->tcode, destination_id, request->generation,
 			speed, request->offset, e->response.data,
@@ -1223,7 +1205,8 @@ static void iso_resource_work(struct work_struct *work)
 	todo = r->todo;
 	/* Allow 1000ms grace period for other reallocations. */
 	if (todo == ISO_RES_ALLOC &&
-	    time_is_after_jiffies(client->device->card->reset_jiffies + HZ)) {
+	    time_before64(get_jiffies_64(),
+			  client->device->card->reset_jiffies + HZ)) {
 		schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
 		skip = true;
 	} else {
@@ -1678,6 +1661,25 @@ static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
 	return ret;
 }
 
+static int is_outbound_transaction_resource(int id, void *p, void *data)
+{
+	struct client_resource *resource = p;
+
+	return resource->release == release_transaction;
+}
+
+static int has_outbound_transactions(struct client *client)
+{
+	int ret;
+
+	spin_lock_irq(&client->lock);
+	ret = idr_for_each(&client->resource_idr,
+			   is_outbound_transaction_resource, NULL);
+	spin_unlock_irq(&client->lock);
+
+	return ret;
+}
+
 static int shutdown_resource(int id, void *p, void *data)
 {
 	struct client_resource *resource = p;
@@ -1713,6 +1715,8 @@ static int fw_device_op_release(struct inode *inode, struct file *file)
 	client->in_shutdown = true;
 	spin_unlock_irq(&client->lock);
 
+	wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
+
 	idr_for_each(&client->resource_idr, shutdown_resource, client);
 	idr_remove_all(&client->resource_idr);
 	idr_destroy(&client->resource_idr);

drivers/firewire/core-device.c

@@ -747,7 +747,8 @@ static void fw_device_shutdown(struct work_struct *work)
 		container_of(work, struct fw_device, work.work);
 	int minor = MINOR(device->device.devt);
 
-	if (time_is_after_jiffies(device->card->reset_jiffies + SHUTDOWN_DELAY)
+	if (time_before64(get_jiffies_64(),
+			  device->card->reset_jiffies + SHUTDOWN_DELAY)
 	    && !list_empty(&device->card->link)) {
 		schedule_delayed_work(&device->work, SHUTDOWN_DELAY);
 		return;
@@ -954,8 +955,9 @@ static void fw_device_init(struct work_struct *work)
 			device->config_rom_retries++;
 			schedule_delayed_work(&device->work, RETRY_DELAY);
 		} else {
-			fw_notify("giving up on config rom for node id %x\n",
-				  device->node_id);
+			if (device->node->link_on)
+				fw_notify("giving up on config rom for node id %x\n",
+					  device->node_id);
 			if (device->node == device->card->root_node)
 				fw_schedule_bm_work(device->card, 0);
 			fw_device_release(&device->device);
@@ -1168,9 +1170,12 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
 
 	switch (event) {
 	case FW_NODE_CREATED:
-	case FW_NODE_LINK_ON:
-		if (!node->link_on)
-			break;
+		/*
+		 * Attempt to scan the node, regardless whether its self ID has
+		 * the L (link active) flag set or not.  Some broken devices
+		 * send L=0 but have an up-and-running link; others send L=1
+		 * without actually having a link.
+		 */
  create:
 		device = kzalloc(sizeof(*device), GFP_ATOMIC);
 		if (device == NULL)
@@ -1213,6 +1218,7 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
 		break;
 
 	case FW_NODE_INITIATED_RESET:
+	case FW_NODE_LINK_ON:
 		device = node->data;
 		if (device == NULL)
 			goto create;
@@ -1230,10 +1236,10 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
 		break;
 
 	case FW_NODE_UPDATED:
-		if (!node->link_on || node->data == NULL)
+		device = node->data;
+		if (device == NULL)
 			break;
 
-		device = node->data;
 		device->node_id = node->node_id;
 		smp_wmb();  /* update node_id before generation */
 		device->generation = card->generation;

drivers/firewire/core-iso.c

@@ -235,45 +235,45 @@ static int manage_bandwidth(struct fw_card *card, int irm_id, int generation,
 static int manage_channel(struct fw_card *card, int irm_id, int generation,
 		u32 channels_mask, u64 offset, bool allocate, __be32 data[2])
 {
-	__be32 c, all, old;
-	int i, ret = -EIO, retry = 5;
+	__be32 bit, all, old;
+	int channel, ret = -EIO, retry = 5;
 
 	old = all = allocate ? cpu_to_be32(~0) : 0;
 
-	for (i = 0; i < 32; i++) {
-		if (!(channels_mask & 1 << i))
+	for (channel = 0; channel < 32; channel++) {
+		if (!(channels_mask & 1 << channel))
 			continue;
 
 		ret = -EBUSY;
 
-		c = cpu_to_be32(1 << (31 - i));
-		if ((old & c) != (all & c))
+		bit = cpu_to_be32(1 << (31 - channel));
+		if ((old & bit) != (all & bit))
 			continue;
 
 		data[0] = old;
-		data[1] = old ^ c;
+		data[1] = old ^ bit;
 		switch (fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
 					   irm_id, generation, SCODE_100,
 					   offset, data, 8)) {
 		case RCODE_GENERATION:
 			/* A generation change frees all channels. */
-			return allocate ? -EAGAIN : i;
+			return allocate ? -EAGAIN : channel;
 
 		case RCODE_COMPLETE:
 			if (data[0] == old)
-				return i;
+				return channel;
 
 			old = data[0];
 
 			/* Is the IRM 1394a-2000 compliant? */
-			if ((data[0] & c) == (data[1] & c))
+			if ((data[0] & bit) == (data[1] & bit))
 				continue;
 
 			/* 1394-1995 IRM, fall through to retry. */
 		default:
 			if (retry) {
 				retry--;
-				i--;
+				channel--;
 			} else {
 				ret = -EIO;
 			}

drivers/firewire/core-topology.c

@@ -545,7 +545,7 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
 	 */
 	smp_wmb();
 	card->generation = generation;
-	card->reset_jiffies = jiffies;
+	card->reset_jiffies = get_jiffies_64();
 	card->bm_node_id  = 0xffff;
 	card->bm_abdicate = bm_abdicate;
 	fw_schedule_bm_work(card, 0);