From 0fa1986f3a6c385b3bca0b6a051c30e548bda30d Mon Sep 17 00:00:00 2001 From: Jay Fenlason Date: Sat, 29 Nov 2008 17:44:57 +0100 Subject: firewire: improve refcounting of fw_card Take a reference to the card whenever fw_card_bm_work() is scheduled on that card and release it when the work is done. This allows us to remove the cancel_delayed_work_sync() in fw_core_remove_card(). Signed-off-by: Jay Fenlason Signed-off-by: Stefan Richter (patch update) --- drivers/firewire/fw-card.c | 18 +++++++++++++++--- drivers/firewire/fw-device.c | 6 +++--- drivers/firewire/fw-topology.c | 2 +- drivers/firewire/fw-transaction.h | 2 ++ 4 files changed, 21 insertions(+), 7 deletions(-) (limited to 'drivers/firewire') diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c index c7760794de0d..799f94424c8a 100644 --- a/drivers/firewire/fw-card.c +++ b/drivers/firewire/fw-card.c @@ -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 31b6c74d34df..c173be383725 100644 --- a/drivers/firewire/fw-device.c +++ b/drivers/firewire/fw-device.c @@ -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-topology.c b/drivers/firewire/fw-topology.c index 5e204713002d..7687dca1a690 100644 --- a/drivers/firewire/fw-topology.c +++ b/drivers/firewire/fw-topology.c @@ -530,7 +530,7 @@ 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.h b/drivers/firewire/fw-transaction.h index 839466f0a795..0497a18dc59e 100644 --- a/drivers/firewire/fw-transaction.h +++ b/drivers/firewire/fw-transaction.h @@ -278,6 +278,8 @@ 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 -- cgit v1.2.3