[PATCH 11/18] smartpqi: fix kdump issue when ctrl is locked up

[Don Brace <don.brace@microchip.com>]

From: Mahesh Rajashekhara <mahesh.rajashekhara@microchip.com>

Avoid dropping into shell if the controller is in locked up state.

Driver issues SIS soft reset to bring back the controller to SIS mode
while OS boots into kdump mode.

If the controller is in lockup state, SIS soft reset does not work.

Since the controller lockup code has not been cleared, driver considers
the firmware is no longer up and running. Driver returns back an error
code to OS and the kdump fails.

Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Signed-off-by: Mahesh Rajashekhara <mahesh.rajashekhara@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
---
 drivers/scsi/smartpqi/smartpqi_init.c |   39 +++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 16 deletions(-)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index de53180fab9c..8bd4de6306db 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -7986,6 +7986,21 @@ static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
 	return pqi_revert_to_sis_mode(ctrl_info);
 }
 
+static void pqi_perform_lockup_action(void)
+{
+	switch (pqi_lockup_action) {
+	case PANIC:
+		panic("FATAL: Smart Family Controller lockup detected");
+		break;
+	case REBOOT:
+		emergency_restart();
+		break;
+	case NONE:
+	default:
+		break;
+	}
+}
+
 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
 {
 	int rc;
@@ -8010,8 +8025,15 @@ static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
 	 * commands.
 	 */
 	rc = sis_wait_for_ctrl_ready(ctrl_info);
-	if (rc)
+	if (rc) {
+		if (reset_devices) {
+			dev_err(&ctrl_info->pci_dev->dev,
+				"kdump init failed with error %d\n", rc);
+			pqi_lockup_action = REBOOT;
+			pqi_perform_lockup_action();
+		}
 		return rc;
+	}
 
 	/*
 	 * Get the controller properties.  This allows us to determine
@@ -8736,21 +8758,6 @@ static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info, unsigned int de
 	return pqi_ctrl_init_resume(ctrl_info);
 }
 
-static void pqi_perform_lockup_action(void)
-{
-	switch (pqi_lockup_action) {
-	case PANIC:
-		panic("FATAL: Smart Family Controller lockup detected");
-		break;
-	case REBOOT:
-		emergency_restart();
-		break;
-	case NONE:
-	default:
-		break;
-	}
-}
-
 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
 	.data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
 	.status = SAM_STAT_CHECK_CONDITION,