Merge branch 'linus' into release

7 files changed, 42 insertions, 40 deletions

diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index 418c18f07e9..799f94424c8 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -75,7 +75,7 @@ generate_config_rom(struct fw_card *card, size_t *config_rom_length)
 	 * controller, block reads to the config rom accesses the host
 	 * memory, but quadlet read access the hardware bus info block
 	 * registers.  That's just crack, but it means we should make
-	 * sure the contents of bus info block in host memory mathces
+	 * sure the contents of bus info block in host memory matches
 	 * the version stored in the OHCI registers.
 	 */
 
@@ -189,6 +189,17 @@ static const char gap_count_table[] = {
 	63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40
 };
 
+void
+fw_schedule_bm_work(struct fw_card *card, unsigned long delay)
+{
+	int scheduled;
+
+	fw_card_get(card);
+	scheduled = schedule_delayed_work(&card->work, delay);
+	if (!scheduled)
+		fw_card_put(card);
+}
+
 static void
 fw_card_bm_work(struct work_struct *work)
 {
@@ -206,7 +217,7 @@ fw_card_bm_work(struct work_struct *work)
 
 	if (local_node == NULL) {
 		spin_unlock_irqrestore(&card->lock, flags);
-		return;
+		goto out_put_card;
 	}
 	fw_node_get(local_node);
 	fw_node_get(root_node);
@@ -280,7 +291,7 @@ fw_card_bm_work(struct work_struct *work)
 		 * this task 100ms from now.
 		 */
 		spin_unlock_irqrestore(&card->lock, flags);
-		schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10));
+		fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 10));
 		goto out;
 	}
 
@@ -355,6 +366,8 @@ fw_card_bm_work(struct work_struct *work)
 		fw_device_put(root_device);
 	fw_node_put(root_node);
 	fw_node_put(local_node);
+ out_put_card:
+	fw_card_put(card);
 }
 
 static void
@@ -510,7 +523,6 @@ fw_core_remove_card(struct fw_card *card)
 	fw_card_put(card);
 	wait_for_completion(&card->done);
 
-	cancel_delayed_work_sync(&card->work);
 	WARN_ON(!list_empty(&card->transaction_list));
 	del_timer_sync(&card->flush_timer);
 }
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index 6b9be42c7b9..c173be38372 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -617,7 +617,7 @@ static int shutdown_unit(struct device *device, void *data)
  */
 DECLARE_RWSEM(fw_device_rwsem);
 
-static DEFINE_IDR(fw_device_idr);
+DEFINE_IDR(fw_device_idr);
 int fw_cdev_major;
 
 struct fw_device *fw_device_get_by_devt(dev_t devt)
@@ -689,7 +689,7 @@ static void fw_device_init(struct work_struct *work)
 			fw_notify("giving up on config rom for node id %x\n",
 				  device->node_id);
 			if (device->node == device->card->root_node)
-				schedule_delayed_work(&device->card->work, 0);
+				fw_schedule_bm_work(device->card, 0);
 			fw_device_release(&device->device);
 		}
 		return;
@@ -758,7 +758,7 @@ static void fw_device_init(struct work_struct *work)
 	 * pretty harmless.
 	 */
 	if (device->node == device->card->root_node)
-		schedule_delayed_work(&device->card->work, 0);
+		fw_schedule_bm_work(device->card, 0);
 
 	return;
 
@@ -892,7 +892,7 @@ static void fw_device_refresh(struct work_struct *work)
 	fw_device_shutdown(work);
  out:
 	if (node_id == card->root_node->node_id)
-		schedule_delayed_work(&card->work, 0);
+		fw_schedule_bm_work(card, 0);
 }
 
 void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h
index 42305bbac72..df51732608d 100644
--- a/drivers/firewire/fw-device.h
+++ b/drivers/firewire/fw-device.h
@@ -21,6 +21,7 @@
 
 #include <linux/fs.h>
 #include <linux/cdev.h>
+#include <linux/idr.h>
 #include <linux/rwsem.h>
 #include <asm/atomic.h>
 
@@ -99,6 +100,7 @@ void fw_device_cdev_update(struct fw_device *device);
 void fw_device_cdev_remove(struct fw_device *device);
 
 extern struct rw_semaphore fw_device_rwsem;
+extern struct idr fw_device_idr;
 extern int fw_cdev_major;
 
 /*
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index e54403ee59e..e88d5067448 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -670,17 +670,6 @@ static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
 			&d, sizeof(d), complete_agent_reset_write_no_wait, t);
 }
 
-static void sbp2_set_generation(struct sbp2_logical_unit *lu, int generation)
-{
-	struct fw_card *card = fw_device(lu->tgt->unit->device.parent)->card;
-	unsigned long flags;
-
-	/* serialize with comparisons of lu->generation and card->generation */
-	spin_lock_irqsave(&card->lock, flags);
-	lu->generation = generation;
-	spin_unlock_irqrestore(&card->lock, flags);
-}
-
 static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
 {
 	/*
@@ -884,7 +873,7 @@ static void sbp2_login(struct work_struct *work)
 		goto out;
 
 	generation    = device->generation;
-	smp_rmb();    /* node_id must not be older than generation */
+	smp_rmb();    /* node IDs must not be older than generation */
 	node_id       = device->node_id;
 	local_node_id = device->card->node_id;
 
@@ -908,7 +897,8 @@ static void sbp2_login(struct work_struct *work)
 
 	tgt->node_id	  = node_id;
 	tgt->address_high = local_node_id << 16;
-	sbp2_set_generation(lu, generation);
+	smp_wmb();	  /* node IDs must not be older than generation */
+	lu->generation	  = generation;
 
 	lu->command_block_agent_address =
 		((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
@@ -1201,7 +1191,7 @@ static void sbp2_reconnect(struct work_struct *work)
 		goto out;
 
 	generation    = device->generation;
-	smp_rmb();    /* node_id must not be older than generation */
+	smp_rmb();    /* node IDs must not be older than generation */
 	node_id       = device->node_id;
 	local_node_id = device->card->node_id;
 
@@ -1228,7 +1218,8 @@ static void sbp2_reconnect(struct work_struct *work)
 
 	tgt->node_id      = node_id;
 	tgt->address_high = local_node_id << 16;
-	sbp2_set_generation(lu, generation);
+	smp_wmb();	  /* node IDs must not be older than generation */
+	lu->generation	  = generation;
 
 	fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
 		  tgt->bus_id, lu->lun, lu->retries);
diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c
index 5e204713002..c9be6e6948c 100644
--- a/drivers/firewire/fw-topology.c
+++ b/drivers/firewire/fw-topology.c
@@ -355,6 +355,9 @@ report_lost_node(struct fw_card *card,
 {
 	fw_node_event(card, node, FW_NODE_DESTROYED);
 	fw_node_put(node);
+
+	/* Topology has changed - reset bus manager retry counter */
+	card->bm_retries = 0;
 }
 
 static void
@@ -374,6 +377,9 @@ report_found_node(struct fw_card *card,
 	}
 
 	fw_node_event(card, node, FW_NODE_CREATED);
+
+	/* Topology has changed - reset bus manager retry counter */
+	card->bm_retries = 0;
 }
 
 void fw_destroy_nodes(struct fw_card *card)
@@ -514,14 +520,6 @@ fw_core_handle_bus_reset(struct fw_card *card,
 
 	spin_lock_irqsave(&card->lock, flags);
 
-	/*
-	 * If the new topology has a different self_id_count the topology
-	 * changed, either nodes were added or removed. In that case we
-	 * reset the IRM reset counter.
-	 */
-	if (card->self_id_count != self_id_count)
-		card->bm_retries = 0;
-
 	card->node_id = node_id;
 	/*
 	 * Update node_id before generation to prevent anybody from using
@@ -530,7 +528,7 @@ fw_core_handle_bus_reset(struct fw_card *card,
 	smp_wmb();
 	card->generation = generation;
 	card->reset_jiffies = jiffies;
-	schedule_delayed_work(&card->work, 0);
+	fw_schedule_bm_work(card, 0);
 
 	local_node = build_tree(card, self_ids, self_id_count);
 
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 2884f876397..699ac041f39 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -19,6 +19,7 @@
  */
 
 #include <linux/completion.h>
+#include <linux/idr.h>
 #include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/module.h>
@@ -971,6 +972,7 @@ static void __exit fw_core_cleanup(void)
 {
 	unregister_chrdev(fw_cdev_major, "firewire");
 	bus_unregister(&fw_bus_type);
+	idr_destroy(&fw_device_idr);
 }
 
 module_init(fw_core_init);
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 839466f0a79..c9ab12a15f6 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -237,14 +237,6 @@ struct fw_card {
 	int link_speed;
 	int config_rom_generation;
 
-	/*
-	 * We need to store up to 4 self ID for a maximum of 63
-	 * devices plus 3 words for the topology map header.
-	 */
-	int self_id_count;
-	u32 topology_map[252 + 3];
-	u32 broadcast_channel;
-
 	spinlock_t lock; /* Take this lock when handling the lists in
 			  * this struct. */
 	struct fw_node *local_node;
@@ -262,6 +254,9 @@ struct fw_card {
 	struct delayed_work work;
 	int bm_retries;
 	int bm_generation;
+
+	u32 broadcast_channel;
+	u32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
 };
 
 static inline struct fw_card *fw_card_get(struct fw_card *card)
@@ -278,6 +273,8 @@ static inline void fw_card_put(struct fw_card *card)
 	kref_put(&card->kref, fw_card_release);
 }
 
+extern void fw_schedule_bm_work(struct fw_card *card, unsigned long delay);
+
 /*
  * The iso packet format allows for an immediate header/payload part
  * stored in 'header' immediately after the packet info plus an