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From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	hongwus@codeaurora.org, ziqichen@codeaurora.org,
	rnayak@codeaurora.org, linux-scsi@vger.kernel.org,
	kernel-team@android.com, saravanak@google.com,
	salyzyn@google.com, cang@codeaurora.org
Cc: Bart Van Assche <bvanassche@acm.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	open list <linux-kernel@vger.kernel.org>,
	Alan Stern <stern@rowland.harvard.edu>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-mediatek@lists.infradead.org>,
	Stanley Chu <stanley.chu@mediatek.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH RFC v2 1/1] scsi: pm: Leave runtime PM status alone during system resume/thaw/restore
Date: Fri, 20 Nov 2020 00:37:22 -0800	[thread overview]
Message-ID: <1605861443-11459-1-git-send-email-cang@codeaurora.org> (raw)

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 <stanley.chu@mediatek.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Can Guo <cang@codeaurora.org>
---

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-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	hongwus@codeaurora.org, ziqichen@codeaurora.org,
	rnayak@codeaurora.org, linux-scsi@vger.kernel.org,
	kernel-team@android.com, saravanak@google.com,
	salyzyn@google.com, cang@codeaurora.org
Cc: Stanley Chu <stanley.chu@mediatek.com>,
	Bart Van Assche <bvanassche@acm.org>,
	Alan Stern <stern@rowland.harvard.edu>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-kernel@vger.kernel.org (open list),
	linux-arm-kernel@lists.infradead.org (moderated
	list:ARM/Mediatek SoC support),
	linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek
	SoC support)
Subject: [PATCH RFC v2 1/1] scsi: pm: Leave runtime PM status alone during system resume/thaw/restore
Date: Fri, 20 Nov 2020 00:37:22 -0800	[thread overview]
Message-ID: <1605861443-11459-1-git-send-email-cang@codeaurora.org> (raw)

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 <stanley.chu@mediatek.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Can Guo <cang@codeaurora.org>
---

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.


WARNING: multiple messages have this Message-ID (diff)
From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	hongwus@codeaurora.org, ziqichen@codeaurora.org,
	rnayak@codeaurora.org, linux-scsi@vger.kernel.org,
	kernel-team@android.com, saravanak@google.com,
	salyzyn@google.com, cang@codeaurora.org
Cc: Bart Van Assche <bvanassche@acm.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	open list <linux-kernel@vger.kernel.org>,
	Alan Stern <stern@rowland.harvard.edu>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-mediatek@lists.infradead.org>,
	Stanley Chu <stanley.chu@mediatek.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH RFC v2 1/1] scsi: pm: Leave runtime PM status alone during system resume/thaw/restore
Date: Fri, 20 Nov 2020 00:37:22 -0800	[thread overview]
Message-ID: <1605861443-11459-1-git-send-email-cang@codeaurora.org> (raw)

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 <stanley.chu@mediatek.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Can Guo <cang@codeaurora.org>
---

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

             reply	other threads:[~2020-11-20  8:37 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-20  8:37 Can Guo [this message]
2020-11-20  8:37 ` [PATCH RFC v2 1/1] scsi: pm: Leave runtime PM status alone during system resume/thaw/restore Can Guo
2020-11-20  8:37 ` Can Guo
2020-11-20 16:35 ` Alan Stern
2020-11-20 16:35   ` Alan Stern
2020-11-20 16:35   ` Alan Stern
2020-11-21 17:00   ` Bart Van Assche
2020-11-21 17:00     ` Bart Van Assche
2020-11-21 17:00     ` Bart Van Assche
2020-11-21 17:32     ` Alan Stern
2020-11-21 17:32       ` Alan Stern
2020-11-21 17:32       ` Alan Stern
2020-11-23  1:23   ` Can Guo
2020-11-23  1:23     ` Can Guo
2020-11-23  3:02     ` Alan Stern
2020-11-23  3:02       ` Alan Stern
2020-11-23  3:02       ` Alan Stern

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