From: Xiang Chen <chenxiang66@hisilicon.com>
Date: Mon, 20 Dec 2021 19:21:34 +0800
Subject: scsi: libsas: Refactor sas_queue_deferred_work()
Git-commit: 1bc35475c6bf6d078b3800e516978f37c1ecda36
Patch-mainline: v5.17-rc1
References: bsc#1198802

In the second part of function __sas_drain_work(), deferred work is queued.
This functionality is required other places so factor it out into the
function sas_queue_deferred_work().

Link: https://lore.kernel.org/r/1639999298-244569-12-git-send-email-chenxiang66@hisilicon.com
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/libsas/sas_event.c    | 25 ++++++++++++++-----------
 drivers/scsi/libsas/sas_internal.h |  1 +
 2 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c
index af605620ea13..01e544ca518a 100644
--- a/drivers/scsi/libsas/sas_event.c
+++ b/drivers/scsi/libsas/sas_event.c
@@ -41,12 +41,23 @@ static int sas_queue_event(int event, struct sas_work *work,
 	return rc;
 }
 
-
-void __sas_drain_work(struct sas_ha_struct *ha)
+void sas_queue_deferred_work(struct sas_ha_struct *ha)
 {
 	struct sas_work *sw, *_sw;
 	int ret;
 
+	spin_lock_irq(&ha->lock);
+	list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
+		list_del_init(&sw->drain_node);
+		ret = sas_queue_work(ha, sw);
+		if (ret != 1)
+			sas_free_event(to_asd_sas_event(&sw->work));
+	}
+	spin_unlock_irq(&ha->lock);
+}
+
+void __sas_drain_work(struct sas_ha_struct *ha)
+{
 	set_bit(SAS_HA_DRAINING, &ha->state);
 	/* flush submitters */
 	spin_lock_irq(&ha->lock);
@@ -55,16 +66,8 @@ void __sas_drain_work(struct sas_ha_struct *ha)
 	drain_workqueue(ha->event_q);
 	drain_workqueue(ha->disco_q);
 
-	spin_lock_irq(&ha->lock);
 	clear_bit(SAS_HA_DRAINING, &ha->state);
-	list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
-		list_del_init(&sw->drain_node);
-		ret = sas_queue_work(ha, sw);
-		if (ret != 1)
-			sas_free_event(to_asd_sas_event(&sw->work));
-
-	}
-	spin_unlock_irq(&ha->lock);
+	sas_queue_deferred_work(ha);
 }
 
 int sas_drain_work(struct sas_ha_struct *ha)
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index ad9764a976c3..acd515c01861 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -57,6 +57,7 @@ void sas_unregister_ports(struct sas_ha_struct *sas_ha);
 
 void sas_disable_revalidation(struct sas_ha_struct *ha);
 void sas_enable_revalidation(struct sas_ha_struct *ha);
+void sas_queue_deferred_work(struct sas_ha_struct *ha);
 void __sas_drain_work(struct sas_ha_struct *ha);
 
 void sas_deform_port(struct asd_sas_phy *phy, int gone);