linux-kernel - [PATCH v2 1/3] PM: domains: Pass generic PM noirq hooks to genpd_finish

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Date:   Tue,  1 Nov 2022 10:47:34 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     "Rafael J . Wysocki" <rafael@...nel.org>
Cc:     Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shawn Guo <shawn.guo@...aro.org>
Subject: [PATCH v2 1/3] PM: domains: Pass generic PM noirq hooks to genpd_finish_suspend()

While argument `poweroff` works fine for genpd_finish_suspend() to handle
distinction between suspend and poweroff, it won't scale if we want to
use it for freeze as well.  Pass generic PM noirq hooks as arguments
instead, so that the function can possibly cover freeze case too.

Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
---
 drivers/base/power/domain.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 6471b559230e..54f6b0dd35fb 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1189,12 +1189,15 @@ static int genpd_prepare(struct device *dev)
  * genpd_finish_suspend - Completion of suspend or hibernation of device in an
  *   I/O pm domain.
  * @dev: Device to suspend.
- * @poweroff: Specifies if this is a poweroff_noirq or suspend_noirq callback.
+ * @suspend_noirq: Generic suspend_noirq callback.
+ * @resume_noirq: Generic resume_noirq callback.
  *
  * Stop the device and remove power from the domain if all devices in it have
  * been stopped.
  */
-static int genpd_finish_suspend(struct device *dev, bool poweroff)
+static int genpd_finish_suspend(struct device *dev,
+				int (*suspend_noirq)(struct device *dev),
+				int (*resume_noirq)(struct device *dev))
 {
 	struct generic_pm_domain *genpd;
 	int ret = 0;
@@ -1203,10 +1206,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
 	if (IS_ERR(genpd))
 		return -EINVAL;
 
-	if (poweroff)
-		ret = pm_generic_poweroff_noirq(dev);
-	else
-		ret = pm_generic_suspend_noirq(dev);
+	ret = suspend_noirq(dev);
 	if (ret)
 		return ret;
 
@@ -1217,10 +1217,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
 	    !pm_runtime_status_suspended(dev)) {
 		ret = genpd_stop_dev(genpd, dev);
 		if (ret) {
-			if (poweroff)
-				pm_generic_restore_noirq(dev);
-			else
-				pm_generic_resume_noirq(dev);
+			resume_noirq(dev);
 			return ret;
 		}
 	}
@@ -1244,7 +1241,9 @@ static int genpd_suspend_noirq(struct device *dev)
 {
 	dev_dbg(dev, "%s()\n", __func__);
 
-	return genpd_finish_suspend(dev, false);
+	return genpd_finish_suspend(dev,
+				    pm_generic_suspend_noirq,
+				    pm_generic_resume_noirq);
 }
 
 /**
@@ -1353,7 +1352,9 @@ static int genpd_poweroff_noirq(struct device *dev)
 {
 	dev_dbg(dev, "%s()\n", __func__);
 
-	return genpd_finish_suspend(dev, true);
+	return genpd_finish_suspend(dev,
+				    pm_generic_poweroff_noirq,
+				    pm_generic_restore_noirq);
 }
 
 /**
-- 
2.25.1