[PATCH 6.8 581/715] watchdog: starfive: Check pm_runtime_enabled() before decrementing usage counter

[Sasha Levin]

From: Ji Sheng Teoh <jisheng.teoh@xxxxxxxxxxxxxxxx>

[ Upstream commit 8bc22a2f1bf0f402029087fcb53130233a544fed ]

In the probe function, pm_runtime_put_sync() will fail on platform with
runtime PM disabled.
Check if runtime PM is enabled before calling pm_runtime_put_sync() to
fix it.

Fixes: db728ea9c7be ("drivers: watchdog: Add StarFive Watchdog driver")
Signed-off-by: Xingyu Wu <xingyu.wu@xxxxxxxxxxxxxxxx>
Signed-off-by: Ley Foon Tan <leyfoon.tan@xxxxxxxxxxxxxxxx>
Signed-off-by: Ji Sheng Teoh <jisheng.teoh@xxxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240119082722.1133024-1-jisheng.teoh@xxxxxxxxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/watchdog/starfive-wdt.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/watchdog/starfive-wdt.c b/drivers/watchdog/starfive-wdt.c
index e28ead24c520e..df68ae4acbd7e 100644
--- a/drivers/watchdog/starfive-wdt.c
+++ b/drivers/watchdog/starfive-wdt.c
@@ -494,8 +494,13 @@ static int starfive_wdt_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_exit;
 
-	if (!early_enable)
-		pm_runtime_put_sync(&pdev->dev);
+	if (!early_enable) {
+		if (pm_runtime_enabled(&pdev->dev)) {
+			ret = pm_runtime_put_sync(&pdev->dev);
+			if (ret)
+				goto err_exit;
+		}
+	}
 
 	return 0;
 
-- 
2.43.0