[SCSI] megaraid_sas: Return DID_ERROR for SCSI IO, when controller is in critical h/w error

Do not return SCSI_MLQUEUE_HOST_BUSY, but send DID_ERROR to SCSI mid-layer, if
adapter is in critical error state.  "SCSI_MLQUEUE_HOST_BUSY" will keep same
SCSI command in loop and it is not a right return value, if controller is
hardware critical error.

Signed-off-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 3a9ddae86f1f..cd2ee473f08d 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -1471,6 +1471,14 @@ megasas_queue_command_lck(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd
                 return SCSI_MLQUEUE_HOST_BUSY;
 
         spin_lock_irqsave(&instance->hba_lock, flags);
+
+        if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
+                spin_unlock_irqrestore(&instance->hba_lock, flags);
+                scmd->result = DID_ERROR << 16;
+                done(scmd);
+                return 0;
+        }
+
         if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
                 spin_unlock_irqrestore(&instance->hba_lock, flags);
                 return SCSI_MLQUEUE_HOST_BUSY;