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scsi: libsas: use flush_workqueue to process disco events synchronously

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Now we are processing sas event and discover event in different
workqueues.  It's safe to wait the discover event done in the sas event
work. Use flush_workqueue() to insure the disco and revalidate events
processed synchronously so that the whole discover and revalidate
process will not be interrupted by other events.

Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
CC: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jason Yan 2017-12-08 17:42:08 +08:00 committed by Martin K. Petersen
parent 93bdbd06b1
commit 517e5153d2
1 changed files with 4 additions and 0 deletions
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4
drivers/scsi/libsas/sas_port.c
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@ -192,6 +192,7 @@ static void sas_form_port(struct asd_sas_phy *phy)
si->dft->lldd_port_formed(phy);
sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN);
flush_workqueue(sas_ha->disco_q);
}
/**
@ -277,6 +278,9 @@ void sas_porte_broadcast_rcvd(struct work_struct *work)
SAS_DPRINTK("broadcast received: %d\n", prim);
sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN);
if (phy->port)
flush_workqueue(phy->port->ha->disco_q);
}
void sas_porte_link_reset_err(struct work_struct *work)