[PATCH v2 06/15] scsi: mvsas: Add spin_lock/unlock() to protect asd_sas_port->phy_list

[chenxiang <chenxiang66@xxxxxxxxxxxxx>]

From: Xiang Chen <chenxiang66@xxxxxxxxxxxxx>

It lacks of spinlock phy_list_lock when using asd_sas_port->phy_list in
mvsas driver, so add spin_lock/unlock in those places.

Signed-off-by: Xiang Chen <chenxiang66@xxxxxxxxxxxxx>
---
 drivers/scsi/mvsas/mv_sas.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 31d1ea5a5dd2..1e52bc7febfa 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -67,8 +67,10 @@ static struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev)
 
 	while (sha->sas_port[i]) {
 		if (sha->sas_port[i] == dev->port) {
+			spin_lock(&sha->sas_port[i]->phy_list_lock);
 			phy =  container_of(sha->sas_port[i]->phy_list.next,
 				struct asd_sas_phy, port_phy_el);
+			spin_unlock(&sha->sas_port[i]->phy_list_lock);
 			j = 0;
 			while (sha->sas_phy[j]) {
 				if (sha->sas_phy[j] == phy)
@@ -96,6 +98,8 @@ static int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
 	while (sha->sas_port[i]) {
 		if (sha->sas_port[i] == dev->port) {
 			struct asd_sas_phy *phy;
+
+			spin_lock(&sha->sas_port[i]->phy_list_lock);
 			list_for_each_entry(phy,
 				&sha->sas_port[i]->phy_list, port_phy_el) {
 				j = 0;
@@ -109,6 +113,7 @@ static int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
 				num++;
 				n++;
 			}
+			spin_unlock(&sha->sas_port[i]->phy_list_lock);
 			break;
 		}
 		i++;
-- 
2.33.0