scsi: smartpqi: update kexec and power down support
Add PQI reset to driver shutdown callback to work around controller bug.
During an 1.) OS shutdown or 2.) kexec outside of a kdump, the Linux
kernel will clear BME on our controller.
If BME is cleared during a controller/host PCIe transfer, the controller
will lock up.
So we perform a PQI reset in the driver's shutdown callback function to
eliminate the possibility of a controller/host PCIe transfer being
active when the kernel clears BME immediately after calling the driver's
shutdown callback.
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 70b1f97..afd3eed 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -6700,6 +6700,7 @@ static void pqi_shutdown(struct pci_dev *pci_dev)
* storage.
*/
rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
+ pqi_reset(ctrl_info);
if (rc == 0)
return;