scsi: smartpqi: Avoid drive spin-down during suspend

On certain systems (based on PCI IDs), when the OS transitions the system
into the suspend (S3) state, the BMIC flush cache command will indicate a
system RESTART instead of SUSPEND.

This avoids drive spin-down.

Link: https://lore.kernel.org/r/164375211330.440833.7203813692110347698.stgit@brunhilda.pdev.net
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Signed-off-by: Sagar Biradar <sagar.biradar@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.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 b32a5a5a5c215e552d21d8f23c1ec20edf5c5eed..ab12507da436774ae9b2aaca7968ade0c4a72cae 100644 (file)
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -8976,10 +8976,19 @@ static void pqi_process_module_params(void)
        pqi_process_lockup_action_param();
 }
 
+static inline enum bmic_flush_cache_shutdown_event pqi_get_flush_cache_shutdown_event(struct pci_dev *pci_dev)
+{
+       if (pci_dev->subsystem_vendor == PCI_VENDOR_ID_ADAPTEC2 && pci_dev->subsystem_device == 0x1304)
+               return RESTART;
+       return SUSPEND;
+}
+
 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
 {
        struct pqi_ctrl_info *ctrl_info;
+       enum bmic_flush_cache_shutdown_event shutdown_event;
 
+       shutdown_event = pqi_get_flush_cache_shutdown_event(pci_dev);
        ctrl_info = pci_get_drvdata(pci_dev);
 
        pqi_wait_until_ofa_finished(ctrl_info);
@@ -8989,7 +8998,7 @@ static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t stat
        pqi_ctrl_block_device_reset(ctrl_info);
        pqi_ctrl_block_requests(ctrl_info);
        pqi_ctrl_wait_until_quiesced(ctrl_info);
-       pqi_flush_cache(ctrl_info, SUSPEND);
+       pqi_flush_cache(ctrl_info, shutdown_event);
        pqi_stop_heartbeat_timer(ctrl_info);
 
        pqi_crash_if_pending_command(ctrl_info);