[PATCH 6/8] smartpqi: add controller cache flush during rmmod

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

From: Gilbert Wu <Gilbert.Wu@microchip.com>

Add in a call to flush the controller cache during driver removal.

Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Mike Mcgowan <mike.mcgowan@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Gilbert Wu <Gilbert.Wu@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
---
 drivers/scsi/smartpqi/smartpqi_init.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index e82f4de46ea7..e9c924ac1bb2 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -9040,6 +9040,7 @@ static void pqi_pci_remove(struct pci_dev *pci_dev)
 {
 	struct pqi_ctrl_info *ctrl_info;
 	u16 vendor_id;
+	int rc;
 
 	ctrl_info = pci_get_drvdata(pci_dev);
 	if (!ctrl_info)
@@ -9051,6 +9052,13 @@ static void pqi_pci_remove(struct pci_dev *pci_dev)
 	else
 		ctrl_info->ctrl_removal_state = PQI_CTRL_GRACEFUL_REMOVAL;
 
+	if (ctrl_info->ctrl_removal_state == PQI_CTRL_GRACEFUL_REMOVAL) {
+		rc = pqi_flush_cache(ctrl_info, RESTART);
+		if (rc)
+			dev_err(&pci_dev->dev,
+				"unable to flush controller cache during remove\n");
+	}
+
 	pqi_remove_ctrl(ctrl_info);
 }