linux-kernel - [PATCH v1 08/23] watchdog: rz: Discard pm_runtime

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Message-ID: <3340071.5fSG56mABF@rafael.j.wysocki>
Date: Mon, 22 Dec 2025 21:07:46 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Ulf Hansson <ulf.hansson@...aro.org>,
 Brian Norris <briannorris@...omium.org>,
 Wim Van Sebroeck <wim@...ux-watchdog.org>,
 Guenter Roeck <linux@...ck-us.net>, linux-watchdog@...r.kernel.org
Subject: [PATCH v1 08/23] watchdog: rz: Discard pm_runtime_put() return values

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Failing a watchdog stop due to pm_runtime_put() returning a negative
value is not particularly useful.

Returning an error code from pm_runtime_put() merely means that it has
not queued up a work item to check whether or not the device can be
suspended and there are many perfectly valid situations in which that
can happen, like after writing "on" to the devices' runtime PM "control"
attribute in sysfs for one example.  It also happens when the kernel is
configured with CONFIG_PM unset.

Accordingly, update rzg2l_wdt_stop() and rzv2h_wdt_stop() to simply
discard the return value of pm_runtime_put().

This will facilitate a planned change of the pm_runtime_put() return
type to void in the future.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---

This patch is part of a series, but it doesn't depend on anything else
in that series.  The last patch in the series depends on it.

It can be applied by itself and if you decide to do so, please let me
know.

Otherwise, an ACK or equivalent will be appreciated, but also the lack
of specific criticism will be eventually regarded as consent.

---
 drivers/watchdog/rzg2l_wdt.c |    4 +---
 drivers/watchdog/rzv2h_wdt.c |    4 +---
 2 files changed, 2 insertions(+), 6 deletions(-)

--- a/drivers/watchdog/rzg2l_wdt.c
+++ b/drivers/watchdog/rzg2l_wdt.c
@@ -132,9 +132,7 @@ static int rzg2l_wdt_stop(struct watchdo
 	if (ret)
 		return ret;

-	ret = pm_runtime_put(wdev->parent);
-	if (ret < 0)
-		return ret;
+	pm_runtime_put(wdev->parent);

 	return 0;
 }
--- a/drivers/watchdog/rzv2h_wdt.c
+++ b/drivers/watchdog/rzv2h_wdt.c
@@ -174,9 +174,7 @@ static int rzv2h_wdt_stop(struct watchdo
 	if (priv->of_data->wdtdcr)
 		rzt2h_wdt_wdtdcr_count_stop(priv);

-	ret = pm_runtime_put(wdev->parent);
-	if (ret < 0)
-		return ret;
+	pm_runtime_put(wdev->parent);

 	return 0;
 }