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authorSreekanth Reddy <sreekanth.reddy@avagotech.com>2015-11-11 17:30:27 +0530
committerMartin K. Petersen <martin.petersen@oracle.com>2015-11-11 18:45:56 -0500
commit16e179bda58f0931854a669c9a70fd9139015899 (patch)
treea9b22e2d43f3d4e99d5d5866612069930ba54488 /drivers
parent42081173c74e0867b996f5fd6b46d3c1606377c7 (diff)
mpt3sas: fix for driver fails EEH, recovery from injected pci bus error
This patch stops the driver to invoke kthread (which remove the dead ioc) for some time while EEH recovery has started. This patch is a port of commit b4730fb6e54a ("mpt2sas: fix for driver fails EEH, recovery from injected pci bus error")'. Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Acked-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/mpt3sas/mpt3sas_base.c19
-rw-r--r--drivers/scsi/mpt3sas/mpt3sas_base.h1
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 2b33e48eea90..b5b1eb260750 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -157,7 +157,7 @@ _base_fault_reset_work(struct work_struct *work)
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);
@@ -166,6 +166,20 @@ _base_fault_reset_work(struct work_struct *work)
pr_err(MPT3SAS_FMT "SAS host is non-operational !!!!\n",
ioc->name);
+ /* 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, mpt3sas 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_OPERATIONAL) {
rc = mpt3sas_base_hard_reset_handler(ioc, CAN_SLEEP,
FORCE_BIG_HAMMER);
@@ -5162,6 +5178,7 @@ mpt3sas_base_attach(struct MPT3SAS_ADAPTER *ioc)
if (r)
goto out_free_resources;
+ ioc->non_operational_loop = 0;
return 0;
out_free_resources:
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index 08f46a7bb00c..a0d1f1304b44 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -845,6 +845,7 @@ struct MPT3SAS_ADAPTER {
u16 cpu_msix_table_sz;
u32 ioc_reset_count;
MPT3SAS_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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