diff mbox series

[v2,15/15] scsi: hisi_sas: Use autosuspend for the host controller

Message ID 1639999298-244569-16-git-send-email-chenxiang66@hisilicon.com (mailing list archive)
State Accepted
Headers show
Series Add runtime PM support for libsas | expand

Commit Message

chenxiang Dec. 20, 2021, 11:21 a.m. UTC 
From: Xiang Chen <chenxiang66@hisilicon.com>

The controller may frequently enter and exit suspend for each IO which we
need to deal with. This is inefficient and may cause too much suspend and
resume activity for the controller.
To avoid this, use a default 5s autosuspend for the controller to stop
frequently suspending and resuming. This value may still be modified via
sysfs interfaces.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Acked-by: John Garry <john.garry@huawei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 94eb48c93ab1..a45ef9a5e12e 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -4783,6 +4783,8 @@  hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 
 	scsi_scan_host(shost);
 
+	pm_runtime_set_autosuspend_delay(dev, 5000);
+	pm_runtime_use_autosuspend(dev);
 	/*
 	 * For the situation that there are ATA disks connected with SAS
 	 * controller, it additionally creates ata_port which will affect the