1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 6dec7cff316f..c167911221e9 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -112,9 +112,12 @@ _scsih_set_fwfault_debug(const char *val, struct kernel_param *kp)
         if (ret)
                 return ret;
 
+        /* global ioc spinlock to protect controller list on list operations */
         printk(KERN_INFO "setting fwfault_debug(%d)\n", mpt2sas_fwfault_debug);
+        spin_lock(&gioc_lock);
         list_for_each_entry(ioc, &mpt2sas_ioc_list, list)
                 ioc->fwfault_debug = mpt2sas_fwfault_debug;
+        spin_unlock(&gioc_lock);
         return 0;
 }
 
@@ -4437,6 +4440,8 @@ mpt2sas_base_free_resources(struct MPT2SAS_ADAPTER *ioc)
         dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
             __func__));
 
+        /* synchronizing freeing resource with pci_access_mutex lock */
+        mutex_lock(&ioc->pci_access_mutex);
         if (ioc->chip_phys && ioc->chip) {
                 _base_mask_interrupts(ioc);
                 ioc->shost_recovery = 1;
@@ -4456,6 +4461,7 @@ mpt2sas_base_free_resources(struct MPT2SAS_ADAPTER *ioc)
                 pci_disable_pcie_error_reporting(pdev);
                 pci_disable_device(pdev);
         }
+        mutex_unlock(&ioc->pci_access_mutex);
         return;
 }