Commit 70ba20be authored by Sagar Biradar's avatar Sagar Biradar Committed by Martin K. Petersen
Browse files

scsi: smartpqi: Eliminate drive spin down on warm boot 

Avoid drive spin down during a warm boot.

Call the BMIC Flush Cache command (0xc2) to indicate the reason for the
flush cache (shutdown, hibernate, suspend, or restart).

Link: https://lore.kernel.org/r/164375208810.440833.11254644025650871435.stgit@brunhilda.pdev.net


Reviewed-by: default avatarMike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: default avatarScott Benesh <scott.benesh@microchip.com>
Reviewed-by: default avatarScott Teel <scott.teel@microchip.com>
Signed-off-by: default avatarSagar Biradar <sagar.biradar@microchip.com>
Signed-off-by: default avatarDon Brace <don.brace@microchip.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 2a47834d

drivers/scsi/smartpqi/smartpqi_init.c

+7 −1
Original line number Diff line number Diff line
@@ -8902,6 +8902,7 @@ static void pqi_shutdown(struct pci_dev *pci_dev) 
{

	int rc;

	struct pqi_ctrl_info *ctrl_info;

	enum bmic_flush_cache_shutdown_event shutdown_event;



	ctrl_info = pci_get_drvdata(pci_dev);

	if (!ctrl_info) {
@@ -8917,11 +8918,16 @@ static void pqi_shutdown(struct pci_dev *pci_dev) 
	pqi_ctrl_block_requests(ctrl_info);

	pqi_ctrl_wait_until_quiesced(ctrl_info);



	if (system_state == SYSTEM_RESTART)

		shutdown_event = RESTART;

	else

		shutdown_event = SHUTDOWN;



	/*

	 * Write all data in the controller's battery-backed cache to

	 * storage.

	 */

	rc = pqi_flush_cache(ctrl_info, SHUTDOWN);

	rc = pqi_flush_cache(ctrl_info, shutdown_event);

	if (rc)

		dev_err(&pci_dev->dev,

			"unable to flush controller cache\n");