[SCSI] mpt2sas: fix for driver fails EEH, recovery from injected pci bus error

[pandora-kernel.git] / drivers / scsi / mpt2sas / mpt2sas_base.c

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index ffd85c5..5e24e7e 100644 (file)
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -155,7 +155,7 @@ _base_fault_reset_work(struct work_struct *work)
        struct task_struct *p;
 
        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-       if (ioc->shost_recovery)
+       if (ioc->shost_recovery || ioc->pci_error_recovery)
                goto rearm_timer;
        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
@@ -164,6 +164,20 @@ _base_fault_reset_work(struct work_struct *work)
                printk(MPT2SAS_INFO_FMT "%s : SAS host is non-operational !!!!\n",
                        ioc->name, __func__);
 
+               /* It may be possible that EEH recovery can resolve some of
+                * pci bus failure issues rather removing the dead ioc function
+                * by considering controller is in a non-operational state. So
+                * here priority is given to the EEH recovery. If it doesn't
+                * not resolve this issue, mpt2sas driver will consider this
+                * controller to non-operational state and remove the dead ioc
+                * function.
+                */
+               if (ioc->non_operational_loop++ < 5) {
+                       spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock,
+                                                        flags);
+                       goto rearm_timer;
+               }
+
                /*
                 * Call _scsih_flush_pending_cmds callback so that we flush all
                 * pending commands back to OS. This call is required to aovid
@@ -193,6 +207,8 @@ _base_fault_reset_work(struct work_struct *work)
                return; /* don't rearm timer */
        }
 
+       ioc->non_operational_loop = 0;
+
        if ((doorbell & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
                rc = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
                    FORCE_BIG_HAMMER);
@@ -4386,6 +4402,7 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
        if (missing_delay[0] != -1 && missing_delay[1] != -1)
                _base_update_missing_delay(ioc, missing_delay[0],
                    missing_delay[1]);
+       ioc->non_operational_loop = 0;
 
        return 0;