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.com
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 31d1ea5..1e52bc7 100644 (file)
--- 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++;