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path: root/drivers/s390/scsi
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Diffstat (limited to 'drivers/s390/scsi')
-rw-r--r--drivers/s390/scsi/zfcp_aux.c27
-rw-r--r--drivers/s390/scsi/zfcp_ccw.c7
-rw-r--r--drivers/s390/scsi/zfcp_def.h1
-rw-r--r--drivers/s390/scsi/zfcp_erp.c6
-rw-r--r--drivers/s390/scsi/zfcp_fc.c1
-rw-r--r--drivers/s390/scsi/zfcp_sysfs.c70
6 files changed, 34 insertions, 78 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 12de1ce9a92d..6b94f8d0609c 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -245,9 +245,9 @@ struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port, u64 fcp_lun)
read_lock_irqsave(&port->unit_list_lock, flags);
list_for_each_entry(unit, &port->unit_list, list)
- if ((unit->fcp_lun == fcp_lun) &&
- !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE)) {
- get_device(&unit->sysfs_device);
+ if (unit->fcp_lun == fcp_lun) {
+ if (!get_device(&unit->sysfs_device))
+ unit = NULL;
read_unlock_irqrestore(&port->unit_list_lock, flags);
return unit;
}
@@ -270,9 +270,9 @@ struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter,
read_lock_irqsave(&adapter->port_list_lock, flags);
list_for_each_entry(port, &adapter->port_list, list)
- if ((port->wwpn == wwpn) &&
- !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE)) {
- get_device(&port->sysfs_device);
+ if (port->wwpn == wwpn) {
+ if (!get_device(&port->sysfs_device))
+ port = NULL;
read_unlock_irqrestore(&adapter->port_list_lock, flags);
return port;
}
@@ -334,9 +334,6 @@ struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun)
}
retval = -EINVAL;
- /* mark unit unusable as long as sysfs registration is not complete */
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
-
INIT_WORK(&unit->scsi_work, zfcp_scsi_scan);
spin_lock_init(&unit->latencies.lock);
@@ -360,7 +357,6 @@ struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun)
list_add_tail(&unit->list, &port->unit_list);
write_unlock_irq(&port->unit_list_lock);
- atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
return unit;
@@ -565,17 +561,12 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
adapter->service_level.seq_print = zfcp_print_sl;
- /* mark adapter unusable as long as sysfs registration is not complete */
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
-
dev_set_drvdata(&ccw_device->dev, adapter);
if (sysfs_create_group(&ccw_device->dev.kobj,
&zfcp_sysfs_adapter_attrs))
goto failed;
- atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
-
if (!zfcp_adapter_scsi_register(adapter))
return adapter;
@@ -692,9 +683,6 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn,
port->sysfs_device.parent = &adapter->ccw_device->dev;
port->sysfs_device.release = zfcp_port_release;
- /* mark port unusable as long as sysfs registration is not complete */
- atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status);
-
if (dev_set_name(&port->sysfs_device, "0x%016llx",
(unsigned long long)wwpn)) {
kfree(port);
@@ -715,8 +703,7 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn,
list_add_tail(&port->list, &adapter->port_list);
write_unlock_irq(&adapter->port_list_lock);
- atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
- atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
+ atomic_set_mask(status | ZFCP_STATUS_COMMON_RUNNING, &port->status);
return port;
diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index 4d35902a0cc5..c22cb72a5ae8 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -113,16 +113,11 @@ static void zfcp_ccw_remove(struct ccw_device *cdev)
write_lock_irq(&adapter->port_list_lock);
list_for_each_entry_safe(port, p, &adapter->port_list, list) {
write_lock(&port->unit_list_lock);
- list_for_each_entry_safe(unit, u, &port->unit_list, list) {
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE,
- &unit->status);
+ list_for_each_entry_safe(unit, u, &port->unit_list, list)
list_move(&unit->list, &unit_remove_lh);
- }
write_unlock(&port->unit_list_lock);
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
list_move(&port->list, &port_remove_lh);
}
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
write_unlock_irq(&adapter->port_list_lock);
zfcp_ccw_adapter_put(adapter); /* put from zfcp_ccw_adapter_by_cdev */
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 7e84e1624d16..08fa31302f75 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -205,7 +205,6 @@ struct zfcp_ls_adisc {
#define ZFCP_COMMON_FLAGS 0xfff00000
/* common status bits */
-#define ZFCP_STATUS_COMMON_REMOVE 0x80000000
#define ZFCP_STATUS_COMMON_RUNNING 0x40000000
#define ZFCP_STATUS_COMMON_ERP_FAILED 0x20000000
#define ZFCP_STATUS_COMMON_UNBLOCKED 0x10000000
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 788fd3a4cd23..3454c2a3b6b1 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -174,7 +174,8 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need,
switch (need) {
case ZFCP_ERP_ACTION_REOPEN_UNIT:
- get_device(&unit->sysfs_device);
+ if (!get_device(&unit->sysfs_device))
+ return NULL;
atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
erp_action = &unit->erp_action;
if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING))
@@ -183,7 +184,8 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need,
case ZFCP_ERP_ACTION_REOPEN_PORT:
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
- get_device(&port->sysfs_device);
+ if (!get_device(&port->sysfs_device))
+ return NULL;
zfcp_erp_action_dismiss_port(port);
atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
erp_action = &port->erp_action;
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index 3e3e72cc724b..9252b65a13a5 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -589,7 +589,6 @@ static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh)
!list_empty(&port->unit_list))
return;
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
list_move_tail(&port->list, lh);
}
diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c
index 901cc9a6ed20..35e920b4fd8a 100644
--- a/drivers/s390/scsi/zfcp_sysfs.c
+++ b/drivers/s390/scsi/zfcp_sysfs.c
@@ -104,10 +104,8 @@ static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \
unsigned long val; \
int retval = 0; \
\
- if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) { \
- retval = -EBUSY; \
- goto out; \
- } \
+ if (!(_feat && get_device(&_feat->sysfs_device))) \
+ return -EBUSY; \
\
if (strict_strtoul(buf, 0, &val) || val != 0) { \
retval = -EINVAL; \
@@ -120,6 +118,7 @@ static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \
_reopen_id, NULL); \
zfcp_erp_wait(_adapter); \
out: \
+ put_device(&_feat->sysfs_device); \
return retval ? retval : (ssize_t) count; \
} \
static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO, \
@@ -161,11 +160,6 @@ static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
if (!adapter)
return -ENODEV;
- if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
- goto out;
- }
-
if (strict_strtoul(buf, 0, &val) || val != 0) {
retval = -EINVAL;
goto out;
@@ -195,14 +189,9 @@ static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
if (!adapter)
return -ENODEV;
- if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
- ret = -EBUSY;
- goto out;
- }
-
ret = zfcp_fc_scan_ports(adapter);
-out:
zfcp_ccw_adapter_put(adapter);
+
return ret ? ret : (ssize_t) count;
}
static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
@@ -216,28 +205,19 @@ static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
struct zfcp_port *port;
u64 wwpn;
- int retval = 0;
+ int retval = -EINVAL;
if (!adapter)
return -ENODEV;
- if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
+ if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
goto out;
- }
-
- if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn)) {
- retval = -EINVAL;
- goto out;
- }
port = zfcp_get_port_by_wwpn(adapter, wwpn);
- if (!port) {
- retval = -ENXIO;
+ if (!port)
goto out;
- }
-
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
+ else
+ retval = 0;
write_lock_irq(&adapter->port_list_lock);
list_del(&port->list);
@@ -283,10 +263,8 @@ static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
u64 fcp_lun;
int retval = -EINVAL;
- if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
- goto out;
- }
+ if (!(port && get_device(&port->sysfs_device)))
+ return -EBUSY;
if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
goto out;
@@ -294,13 +272,14 @@ static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
unit = zfcp_unit_enqueue(port, fcp_lun);
if (IS_ERR(unit))
goto out;
-
- retval = 0;
+ else
+ retval = 0;
zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
zfcp_erp_wait(unit->port->adapter);
flush_work(&unit->scsi_work);
out:
+ put_device(&port->sysfs_device);
return retval ? retval : (ssize_t) count;
}
static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
@@ -313,29 +292,23 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
sysfs_device);
struct zfcp_unit *unit;
u64 fcp_lun;
- int retval = 0;
+ int retval = -EINVAL;
- if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
- retval = -EBUSY;
- goto out;
- }
+ if (!(port && get_device(&port->sysfs_device)))
+ return -EBUSY;
- if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun)) {
- retval = -EINVAL;
+ if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
goto out;
- }
unit = zfcp_get_unit_by_lun(port, fcp_lun);
- if (!unit) {
- retval = -EINVAL;
+ if (!unit)
goto out;
- }
+ else
+ retval = 0;
/* wait for possible timeout during SCSI probe */
flush_work(&unit->scsi_work);
- atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
-
write_lock_irq(&port->unit_list_lock);
list_del(&unit->list);
write_unlock_irq(&port->unit_list_lock);
@@ -345,6 +318,7 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
zfcp_device_unregister(&unit->sysfs_device, &zfcp_sysfs_unit_attrs);
out:
+ put_device(&port->sysfs_device);
return retval ? retval : (ssize_t) count;
}
static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 05:19:24 +0000