From: Kevin Barnett <[email protected]> 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 <[email protected]> Signed-off-by: Kevin Barnett <[email protected]> Signed-off-by: Don Brace <[email protected]> --- drivers/scsi/smartpqi/smartpqi_init.c | 1 + 1 file changed, 1 insertion(+) 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;
