[PATCH v4 09/11] libsas: libsas: use flush_workqueue to process disco events synchronously

From	Jason Yan <yanaijie@huawei.com>
Newsgroups	linux.kernel
Subject	[PATCH v4 09/11] libsas: libsas: use flush_workqueue to process disco events synchronously
Date	2017-09-06 11:20 +0200
Message-ID	<umEF3-81v-5@gated-at.bofh.it> (permalink)
References	<umEF3-81v-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Use flush_workqueue to insure the disco and revalidate events processed synchronously.

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>
---
 drivers/scsi/libsas/sas_port.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c
index 9326628..64722f4 100644
--- a/drivers/scsi/libsas/sas_port.c
+++ b/drivers/scsi/libsas/sas_port.c
@@ -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)
-- 
2.5.0

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[PATCH v4 09/11] libsas: libsas: use flush_workqueue to process disco events synchronously Jason Yan <yanaijie@huawei.com> - 2017-09-06 11:20 +0200

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