[SCSI] zfcp: Assign scheduled work to driver queue

The port_scan work was scheduled to the work_queue provided by the
kernel. This resulted on SMP systems to a likely situation that more
than one scan_work were processed in parallel. This is not required
and openes the possibility of race conditions between the removal of
invalid ports and the enqueue of just scanned ports.  This patch
synchronizes the scan_work tasks by scheduling them to adapter local
work_queue.

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>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index 5f205f85e6f9..d372146af38d 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -94,8 +94,7 @@ extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, char *,
 extern void zfcp_erp_timeout_handler(unsigned long);
 
 /* zfcp_fc.c */
-extern int zfcp_fc_scan_ports(struct zfcp_adapter *);
-extern void _zfcp_fc_scan_ports_later(struct work_struct *);
+extern void zfcp_fc_scan_ports(struct work_struct *);
 extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *);
 extern void zfcp_fc_port_did_lookup(struct work_struct *);
 extern void zfcp_fc_trigger_did_lookup(struct zfcp_port *);