summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/firewire/fw-card.c61
-rw-r--r--drivers/firewire/fw-device.c21
-rw-r--r--drivers/firewire/fw-device.h16
-rw-r--r--drivers/firewire/fw-sbp2.c50
-rw-r--r--drivers/firewire/fw-topology.c1
-rw-r--r--drivers/firewire/fw-transaction.h2
6 files changed, 97 insertions, 54 deletions
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index 3e9719948a8e..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>
@@ -214,17 +215,29 @@ static void
fw_card_bm_work(struct work_struct *work)
{
struct fw_card *card = container_of(work, struct fw_card, work.work);
- struct fw_device *root;
+ struct fw_device *root_device;
+ struct fw_node *root_node, *local_node;
struct bm_data bmd;
unsigned long flags;
int root_id, new_root_id, irm_id, gap_count, generation, grace;
int do_reset = 0;
spin_lock_irqsave(&card->lock, flags);
+ local_node = card->local_node;
+ root_node = card->root_node;
+
+ if (local_node == NULL) {
+ spin_unlock_irqrestore(&card->lock, flags);
+ return;
+ }
+ fw_node_get(local_node);
+ fw_node_get(root_node);
generation = card->generation;
- root = card->root_node->data;
- root_id = card->root_node->node_id;
+ root_device = root_node->data;
+ if (root_device)
+ fw_device_get(root_device);
+ root_id = root_node->node_id;
grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10));
if (card->bm_generation + 1 == generation ||
@@ -243,14 +256,14 @@ fw_card_bm_work(struct work_struct *work)
irm_id = card->irm_node->node_id;
if (!card->irm_node->link_on) {
- new_root_id = card->local_node->node_id;
+ new_root_id = local_node->node_id;
fw_notify("IRM has link off, making local node (%02x) root.\n",
new_root_id);
goto pick_me;
}
bmd.lock.arg = cpu_to_be32(0x3f);
- bmd.lock.data = cpu_to_be32(card->local_node->node_id);
+ bmd.lock.data = cpu_to_be32(local_node->node_id);
spin_unlock_irqrestore(&card->lock, flags);
@@ -267,12 +280,12 @@ fw_card_bm_work(struct work_struct *work)
* Another bus reset happened. Just return,
* the BM work has been rescheduled.
*/
- return;
+ goto out;
}
if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f)
/* Somebody else is BM, let them do the work. */
- return;
+ goto out;
spin_lock_irqsave(&card->lock, flags);
if (bmd.rcode != RCODE_COMPLETE) {
@@ -282,7 +295,7 @@ fw_card_bm_work(struct work_struct *work)
* do a bus reset and pick the local node as
* root, and thus, IRM.
*/
- new_root_id = card->local_node->node_id;
+ new_root_id = local_node->node_id;
fw_notify("BM lock failed, making local node (%02x) root.\n",
new_root_id);
goto pick_me;
@@ -295,7 +308,7 @@ fw_card_bm_work(struct work_struct *work)
*/
spin_unlock_irqrestore(&card->lock, flags);
schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10));
- return;
+ goto out;
}
/*
@@ -305,20 +318,20 @@ fw_card_bm_work(struct work_struct *work)
*/
card->bm_generation = generation;
- if (root == NULL) {
+ if (root_device == NULL) {
/*
* Either link_on is false, or we failed to read the
* config rom. In either case, pick another root.
*/
- new_root_id = card->local_node->node_id;
- } else if (atomic_read(&root->state) != FW_DEVICE_RUNNING) {
+ new_root_id = local_node->node_id;
+ } else if (atomic_read(&root_device->state) != FW_DEVICE_RUNNING) {
/*
* If we haven't probed this device yet, bail out now
* and let's try again once that's done.
*/
spin_unlock_irqrestore(&card->lock, flags);
- return;
- } else if (root->config_rom[2] & BIB_CMC) {
+ goto out;
+ } else if (root_device->config_rom[2] & BIB_CMC) {
/*
* FIXME: I suppose we should set the cmstr bit in the
* STATE_CLEAR register of this node, as described in
@@ -332,7 +345,7 @@ fw_card_bm_work(struct work_struct *work)
* successfully read the config rom, but it's not
* cycle master capable.
*/
- new_root_id = card->local_node->node_id;
+ new_root_id = local_node->node_id;
}
pick_me:
@@ -341,8 +354,8 @@ fw_card_bm_work(struct work_struct *work)
* the typically much larger 1394b beta repeater delays though.
*/
if (!card->beta_repeaters_present &&
- card->root_node->max_hops < ARRAY_SIZE(gap_count_table))
- gap_count = gap_count_table[card->root_node->max_hops];
+ root_node->max_hops < ARRAY_SIZE(gap_count_table))
+ gap_count = gap_count_table[root_node->max_hops];
else
gap_count = 63;
@@ -364,6 +377,11 @@ fw_card_bm_work(struct work_struct *work)
fw_send_phy_config(card, new_root_id, generation, gap_count);
fw_core_initiate_bus_reset(card, 1);
}
+ out:
+ if (root_device)
+ fw_device_put(root_device);
+ fw_node_put(root_node);
+ fw_node_put(local_node);
}
static void
@@ -381,6 +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;
@@ -511,8 +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 5259491580fc..03069a454c07 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -122,7 +122,6 @@ static const char sbp2_driver_name[] = "sbp2";
struct sbp2_logical_unit {
struct sbp2_target *tgt;
struct list_head link;
- struct scsi_device *sdev;
struct fw_address_handler address_handler;
struct list_head orb_list;
@@ -139,6 +138,7 @@ struct sbp2_logical_unit {
int generation;
int retries;
struct delayed_work work;
+ bool has_sdev;
bool blocked;
};
@@ -751,20 +751,34 @@ static void sbp2_unblock(struct sbp2_target *tgt)
scsi_unblock_requests(shost);
}
+static int sbp2_lun2int(u16 lun)
+{
+ struct scsi_lun eight_bytes_lun;
+
+ memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
+ eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff;
+ eight_bytes_lun.scsi_lun[1] = lun & 0xff;
+
+ return scsilun_to_int(&eight_bytes_lun);
+}
+
static void sbp2_release_target(struct kref *kref)
{
struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
struct sbp2_logical_unit *lu, *next;
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);
list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
- if (lu->sdev) {
- scsi_remove_device(lu->sdev);
- scsi_device_put(lu->sdev);
+ sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun));
+ if (sdev) {
+ scsi_remove_device(sdev);
+ scsi_device_put(sdev);
}
sbp2_send_management_orb(lu, tgt->node_id, lu->generation,
SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
@@ -778,6 +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;
@@ -807,7 +822,6 @@ static void sbp2_login(struct work_struct *work)
struct fw_device *device = fw_device(tgt->unit->device.parent);
struct Scsi_Host *shost;
struct scsi_device *sdev;
- struct scsi_lun eight_bytes_lun;
struct sbp2_login_response response;
int generation, node_id, local_node_id;
@@ -820,7 +834,7 @@ static void sbp2_login(struct work_struct *work)
local_node_id = device->card->node_id;
/* If this is a re-login attempt, log out, or we might be rejected. */
- if (lu->sdev)
+ if (lu->has_sdev)
sbp2_send_management_orb(lu, device->node_id, generation,
SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
@@ -859,7 +873,7 @@ static void sbp2_login(struct work_struct *work)
sbp2_agent_reset(lu);
/* This was a re-login. */
- if (lu->sdev) {
+ if (lu->has_sdev) {
sbp2_cancel_orbs(lu);
sbp2_conditionally_unblock(lu);
goto out;
@@ -868,13 +882,8 @@ static void sbp2_login(struct work_struct *work)
if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
ssleep(SBP2_INQUIRY_DELAY);
- memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
- eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff;
- eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff;
shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
-
- sdev = __scsi_add_device(shost, 0, 0,
- scsilun_to_int(&eight_bytes_lun), lu);
+ sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu);
/*
* FIXME: We are unable to perform reconnects while in sbp2_login().
* Therefore __scsi_add_device() will get into trouble if a bus reset
@@ -896,7 +905,8 @@ static void sbp2_login(struct work_struct *work)
}
/* No error during __scsi_add_device() */
- lu->sdev = sdev;
+ lu->has_sdev = true;
+ scsi_device_put(sdev);
sbp2_allow_block(lu);
goto out;
@@ -934,11 +944,11 @@ static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
return -ENOMEM;
}
- lu->tgt = tgt;
- lu->sdev = NULL;
- lu->lun = lun_entry & 0xffff;
- lu->retries = 0;
- lu->blocked = false;
+ lu->tgt = tgt;
+ lu->lun = lun_entry & 0xffff;
+ lu->retries = 0;
+ lu->has_sdev = false;
+ lu->blocked = false;
++tgt->dont_block;
INIT_LIST_HEAD(&lu->orb_list);
INIT_DELAYED_WORK(&lu->work, sbp2_login);
@@ -1080,6 +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-topology.c b/drivers/firewire/fw-topology.c
index 172c1867e9aa..e47bb040197a 100644
--- a/drivers/firewire/fw-topology.c
+++ b/drivers/firewire/fw-topology.c
@@ -383,6 +383,7 @@ void fw_destroy_nodes(struct fw_card *card)
card->color++;
if (card->local_node != NULL)
for_each_fw_node(card, card->local_node, report_lost_node);
+ card->local_node = NULL;
spin_unlock_irqrestore(&card->lock, flags);
}
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;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-29 04:38:31 +0300