scsi: mvsas: Add spin_lock/unlock() to protect asd_sas_port->phy_list

phy_list_lock is not held when using asd_sas_port->phy_list in the mvsas
driver. Add spin_lock/unlock in those places.

Link: https://lore.kernel.org/r/1639999298-244569-7-git-send-email-chenxiang66@hisilicon.comSigned-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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++;