This patch stops the driver to invoke kthread (which remove the dead ioc)
for some time while EEH recovery has started.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@xxxxxxx>
---
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index ffd85c5..2349531 100755
--- 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
@@ -4386,6 +4400,7 @@ 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;
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index 543d8d6..c6ee7aa 100755
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -835,6 +835,7 @@ struct MPT2SAS_ADAPTER {
u16 cpu_msix_table_sz;
u32 ioc_reset_count;
MPT2SAS_FLUSH_RUNNING_CMDS schedule_dead_ioc_flush_running_cmds;
+ u32 non_operational_loop;
/* internal commands, callback index */
u8 scsi_io_cb_idx;
--
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