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-rw-r--r--drivers/firewire/fw-card.c10
-rw-r--r--drivers/firewire/fw-device.c21
-rw-r--r--drivers/firewire/fw-device.h16
-rw-r--r--drivers/firewire/fw-sbp2.c4
-rw-r--r--drivers/firewire/fw-transaction.h2
5 files changed, 35 insertions, 18 deletions
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index e6395b298508..a03462750b95 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/errno.h>
+#include <linux/delay.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/crc-itu-t.h>
@@ -398,6 +399,7 @@ fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
static atomic_t index = ATOMIC_INIT(-1);
kref_init(&card->kref);
+ atomic_set(&card->device_count, 0);
card->index = atomic_inc_return(&index);
card->driver = driver;
card->device = device;
@@ -528,8 +530,14 @@ fw_core_remove_card(struct fw_card *card)
card->driver = &dummy_driver;
fw_destroy_nodes(card);
- flush_scheduled_work();
+ /*
+ * Wait for all device workqueue jobs to finish. Otherwise the
+ * firewire-core module could be unloaded before the jobs ran.
+ */
+ while (atomic_read(&card->device_count) > 0)
+ msleep(100);
+ cancel_delayed_work_sync(&card->work);
fw_flush_transactions(card);
del_timer_sync(&card->flush_timer);
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index 2ab13e0f3469..870125a3638e 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -150,21 +150,10 @@ struct bus_type fw_bus_type = {
};
EXPORT_SYMBOL(fw_bus_type);
-struct fw_device *fw_device_get(struct fw_device *device)
-{
- get_device(&device->device);
-
- return device;
-}
-
-void fw_device_put(struct fw_device *device)
-{
- put_device(&device->device);
-}
-
static void fw_device_release(struct device *dev)
{
struct fw_device *device = fw_device(dev);
+ struct fw_card *card = device->card;
unsigned long flags;
/*
@@ -176,9 +165,9 @@ static void fw_device_release(struct device *dev)
spin_unlock_irqrestore(&device->card->lock, flags);
fw_node_put(device->node);
- fw_card_put(device->card);
kfree(device->config_rom);
kfree(device);
+ atomic_dec(&card->device_count);
}
int fw_device_enable_phys_dma(struct fw_device *device)
@@ -668,7 +657,8 @@ static void fw_device_init(struct work_struct *work)
*/
if (read_bus_info_block(device, device->generation) < 0) {
- if (device->config_rom_retries < MAX_RETRIES) {
+ if (device->config_rom_retries < MAX_RETRIES &&
+ atomic_read(&device->state) == FW_DEVICE_INITIALIZING) {
device->config_rom_retries++;
schedule_delayed_work(&device->work, RETRY_DELAY);
} else {
@@ -805,7 +795,8 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
*/
device_initialize(&device->device);
atomic_set(&device->state, FW_DEVICE_INITIALIZING);
- device->card = fw_card_get(card);
+ atomic_inc(&card->device_count);
+ device->card = card;
device->node = fw_node_get(node);
device->node_id = node->node_id;
device->generation = card->generation;
diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h
index 43808c02793e..78ecd3991b7f 100644
--- a/drivers/firewire/fw-device.h
+++ b/drivers/firewire/fw-device.h
@@ -76,9 +76,21 @@ fw_device_is_shutdown(struct fw_device *device)
return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
}
-struct fw_device *fw_device_get(struct fw_device *device);
+static inline struct fw_device *
+fw_device_get(struct fw_device *device)
+{
+ get_device(&device->device);
+
+ return device;
+}
+
+static inline void
+fw_device_put(struct fw_device *device)
+{
+ put_device(&device->device);
+}
+
struct fw_device *fw_device_get_by_devt(dev_t devt);
-void fw_device_put(struct fw_device *device);
int fw_device_enable_phys_dma(struct fw_device *device);
void fw_device_cdev_update(struct fw_device *device);
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index a093ac329db7..03069a454c07 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -769,6 +769,7 @@ static void sbp2_release_target(struct kref *kref)
struct Scsi_Host *shost =
container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
struct scsi_device *sdev;
+ struct fw_device *device = fw_device(tgt->unit->device.parent);
/* prevent deadlocks */
sbp2_unblock(tgt);
@@ -791,6 +792,7 @@ static void sbp2_release_target(struct kref *kref)
put_device(&tgt->unit->device);
scsi_host_put(shost);
+ fw_device_put(device);
}
static struct workqueue_struct *sbp2_wq;
@@ -1088,6 +1090,8 @@ static int sbp2_probe(struct device *dev)
if (scsi_add_host(shost, &unit->device) < 0)
goto fail_shost_put;
+ fw_device_get(device);
+
/* Initialize to values that won't match anything in our table. */
firmware_revision = 0xff000000;
model = 0xff000000;
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index fa7967b57408..09cb72870454 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -26,6 +26,7 @@
#include <linux/fs.h>
#include <linux/dma-mapping.h>
#include <linux/firewire-constants.h>
+#include <asm/atomic.h>
#define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4)
#define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
@@ -219,6 +220,7 @@ extern struct bus_type fw_bus_type;
struct fw_card {
const struct fw_card_driver *driver;
struct device *device;
+ atomic_t device_count;
struct kref kref;
int node_id;