[PATCH RFC v2 1/1] scsi: pm: Leave runtime PM status alone during system resume/thaw/restore
From: Can Guo <hidden>
Date: 2020-11-20 08:37:28
Also in:
linux-mediatek, linux-scsi, lkml
Subsystem:
scsi subsystem, the rest · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Runtime resume is handled by runtime PM framework, no need to forcibly set runtime PM status to RPM_ACTIVE during system resume/thaw/restore. Cc: Stanley Chu <redacted> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Can Guo <redacted> --- Changes since v1: - Incorporated Bart's comments --- drivers/scsi/scsi_pm.c | 24 +----------------------- 1 file changed, 1 insertion(+), 23 deletions(-)
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index 3717eea..908f27f 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c@@ -79,25 +79,6 @@ static int scsi_dev_type_resume(struct device *dev, scsi_device_resume(to_scsi_device(dev)); dev_dbg(dev, "scsi resume: %d\n", err); - if (err == 0) { - pm_runtime_disable(dev); - err = pm_runtime_set_active(dev); - pm_runtime_enable(dev); - - /* - * Forcibly set runtime PM status of request queue to "active" - * to make sure we can again get requests from the queue - * (see also blk_pm_peek_request()). - * - * The resume hook will correct runtime PM status of the disk. - */ - if (!err && scsi_is_sdev_device(dev)) { - struct scsi_device *sdev = to_scsi_device(dev); - - blk_set_runtime_active(sdev->request_queue); - } - } - return err; }
@@ -165,11 +146,8 @@ static int scsi_bus_resume_common(struct device *dev, */ if (strncmp(scsi_scan_type, "async", 5) != 0) async_synchronize_full_domain(&scsi_sd_pm_domain); - } else { - pm_runtime_disable(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); } + return 0; }
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel