linux-kernel - [PATCH] amba: bus: Drop dev_pm_domain

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Message-ID: <20250827100337.926020-1-claudiu.beznea.uj@bp.renesas.com>
Date: Wed, 27 Aug 2025 13:03:37 +0300
From: Claudiu <claudiu.beznea@...on.dev>
To: linux@...linux.org.uk,
	chentao@...inos.cn,
	claudiu.beznea.uj@...renesas.com,
	rmk+kernel@...linux.org.uk,
	jroedel@...e.de,
	lpieralisi@...nel.org,
	robin.murphy@....com,
	ulf.hansson@...aro.org,
	rafael@...nel.org
Cc: claudiu.beznea@...on.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH] amba: bus: Drop dev_pm_domain_detach() call

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

Starting with commit f99508074e78 ("PM: domains: Detach on
device_unbind_cleanup()"), there is no longer a need to call
dev_pm_domain_detach() in the bus remove function. The
device_unbind_cleanup() function now handles this to avoid
invoking devres cleanup handlers while the PM domain is
powered off, which could otherwise lead to failures as
described in the above-mentioned commit.

Drop the explicit dev_pm_domain_detach() call and rely instead
on the flags passed to dev_pm_domain_attach() to power off the
domain.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
---
 drivers/amba/bus.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 74e34a07ef72..952c45ca6e48 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -291,15 +291,14 @@ static int amba_probe(struct device *dev)
 		if (ret < 0)
 			break;
 
-		ret = dev_pm_domain_attach(dev, PD_FLAG_ATTACH_POWER_ON);
+		ret = dev_pm_domain_attach(dev, PD_FLAG_ATTACH_POWER_ON |
+						PD_FLAG_DETACH_POWER_OFF);
 		if (ret)
 			break;
 
 		ret = amba_get_enable_pclk(pcdev);
-		if (ret) {
-			dev_pm_domain_detach(dev, true);
+		if (ret)
 			break;
-		}
 
 		pm_runtime_get_noresume(dev);
 		pm_runtime_set_active(dev);
@@ -314,7 +313,6 @@ static int amba_probe(struct device *dev)
 		pm_runtime_put_noidle(dev);
 
 		amba_put_disable_pclk(pcdev);
-		dev_pm_domain_detach(dev, true);
 	} while (0);
 
 	return ret;
@@ -336,7 +334,6 @@ static void amba_remove(struct device *dev)
 	pm_runtime_put_noidle(dev);
 
 	amba_put_disable_pclk(pcdev);
-	dev_pm_domain_detach(dev, true);
 }
 
 static void amba_shutdown(struct device *dev)
-- 
2.43.0