diff options
| author | Swen Schillig <swen@vnet.ibm.com> | 2009-11-24 16:53:58 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 19:02:01 +0100 |
| commit | ecf0c7721b104c0ce9c8ca534c911f6310cf92a8 (patch) | |
| tree | 639032b36bcbbe905c98c6f0b3b521dc2f0b1806 /drivers/s390/scsi/zfcp_ccw.c | |
| parent | [SCSI] libfc: Add target reset flag to FCP header file (diff) | |
| download | linux-ecf0c7721b104c0ce9c8ca534c911f6310cf92a8.tar.xz linux-ecf0c7721b104c0ce9c8ca534c911f6310cf92a8.zip | |
[SCSI] zfcp: Replace global config_lock with local list locks
The global config_lock was used to protect the configuration organized
in independent lists. It is not necessary to have a lock on driver
level for this purpose. This patch replaces the global config_lock
with a set of local list locks.
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390/scsi/zfcp_ccw.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_ccw.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c index e08339428ecf..aca2047dc2d5 100644 --- a/drivers/s390/scsi/zfcp_ccw.c +++ b/drivers/s390/scsi/zfcp_ccw.c @@ -100,10 +100,11 @@ static void zfcp_ccw_remove(struct ccw_device *ccw_device) mutex_lock(&zfcp_data.config_mutex); adapter = dev_get_drvdata(&ccw_device->dev); - if (!adapter) - goto out; mutex_unlock(&zfcp_data.config_mutex); + if (!adapter) + return; + cancel_work_sync(&adapter->scan_work); mutex_lock(&zfcp_data.config_mutex); @@ -111,18 +112,21 @@ static void zfcp_ccw_remove(struct ccw_device *ccw_device) /* this also removes the scsi devices, so call it first */ zfcp_adapter_scsi_unregister(adapter); - write_lock_irq(&zfcp_data.config_lock); - list_for_each_entry_safe(port, p, &adapter->port_list_head, list) { - list_for_each_entry_safe(unit, u, &port->unit_list_head, list) { - list_move(&unit->list, &unit_remove_lh); + 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_move(&unit->list, &unit_remove_lh); } - list_move(&port->list, &port_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(&zfcp_data.config_lock); + write_unlock_irq(&adapter->port_list_lock); + mutex_unlock(&zfcp_data.config_mutex); list_for_each_entry_safe(port, p, &port_remove_lh, list) { list_for_each_entry_safe(unit, u, &unit_remove_lh, list) @@ -131,9 +135,6 @@ static void zfcp_ccw_remove(struct ccw_device *ccw_device) } wait_event(adapter->remove_wq, atomic_read(&adapter->refcount) == 0); zfcp_adapter_dequeue(adapter); - -out: - mutex_unlock(&zfcp_data.config_mutex); } /** |