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[SCSI] zfcp: Remove SCSI device when removing unit 

Configuring a LUN in zfcp, also creates a SCSI device. For
consistency, it makes sense to remove the SCSI device when the LUN is
deconfigured. Replace the flush_work with the call to
scsi_remove_device: scsi_remove_device also takes the scan_mutex that
synchronizes itself with any long running device discovery.

Reviewed-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>
This commit is contained in:
Christof Schmitt 2010-07-16 15:37:35 +02:00 committed by James Bottomley
parent 674c3a993c
commit 1bf3ff02ca
3 changed files with 10 additions and 2 deletions
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1
drivers/s390/scsi/zfcp_def.h
View File

@ -212,6 +212,7 @@ struct zfcp_port {
struct work_struct test_link_work;
struct work_struct rport_work;
enum { RPORT_NONE, RPORT_ADD, RPORT_DEL } rport_task;
unsigned int starget_id;
};
struct zfcp_unit {

1
drivers/s390/scsi/zfcp_scsi.c
View File

@ -564,6 +564,7 @@ static void zfcp_scsi_rport_register(struct zfcp_port *port)
rport->maxframe_size = port->maxframe_size;
rport->supported_classes = port->supported_classes;
port->rport = rport;
port->starget_id = rport->scsi_target_id;
zfcp_scsi_queue_unit_register(port);
}

10
drivers/s390/scsi/zfcp_sysfs.c
View File

@ -290,6 +290,7 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
struct zfcp_unit *unit;
u64 fcp_lun;
int retval = -EINVAL;
struct scsi_device *sdev;
if (!(port && get_device(&port->dev)))
return -EBUSY;
@ -303,8 +304,13 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
else
retval = 0;
/* wait for possible timeout during SCSI probe */
flush_work(&unit->scsi_work);
sdev = scsi_device_lookup(port->adapter->scsi_host, 0,
port->starget_id,
scsilun_to_int((struct scsi_lun *)&fcp_lun));
if (sdev) {
scsi_remove_device(sdev);
scsi_device_put(sdev);
}
write_lock_irq(&port->unit_list_lock);
list_del(&unit->list);