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Commit b6d47811 authored by Kevin Barnett's avatar Kevin Barnett Committed by Martin K. Petersen
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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: default avatarScott Benesh <scott.benesh@microsemi.com>
Signed-off-by: default avatarKevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: default avatarDon Brace <don.brace@microsemi.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 4f078e24

drivers/scsi/smartpqi/smartpqi_init.c

+1 −0
Original line number Diff line number Diff line
@@ -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;