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[SCSI] zfcp: Assign scheduled work to driver queue

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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>
This commit is contained in:
Swen Schillig
2009-11-24 16:54:06 +01:00
committed by James Bottomley
parent 6b183334c2
commit 9eae07ef6b
6 changed files with 17 additions and 24 deletions
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2
drivers/s390/scsi/zfcp_erp.c
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@@ -1197,7 +1197,7 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (result == ZFCP_ERP_SUCCEEDED) {
register_service_level(&adapter->service_level);
schedule_work(&adapter->scan_work);
queue_work(adapter->work_queue, &adapter->scan_work);
} else
unregister_service_level(&adapter->service_level);
kref_put(&adapter->ref, zfcp_adapter_release);