If pm_runtime_put_sync() fails after watchdog_register_device()
succeeds, the probe function jumps to err_exit without
unregistering the watchdog device. This leaves the watchdog
registered in the subsystem while the driver fails to load,
resulting in a resource leak.
Add a new error label err_unregister_wdt to properly unregister
the watchdog device.
Fixes: 8bc22a2f1bf0 ("watchdog: starfive: Check pm_runtime_enabled() before decrementing usage counter")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
---
drivers/watchdog/starfive-wdt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/starfive-wdt.c b/drivers/watchdog/starfive-wdt.c
index 355918d62f63..ed71d3960a0f 100644
--- a/drivers/watchdog/starfive-wdt.c
+++ b/drivers/watchdog/starfive-wdt.c
@@ -500,12 +500,14 @@ static int starfive_wdt_probe(struct platform_device *pdev)
if (pm_runtime_enabled(&pdev->dev)) {
ret = pm_runtime_put_sync(&pdev->dev);
if (ret)
- goto err_exit;
+ goto err_unregister_wdt;
}
}
return 0;
+err_unregister_wdt:
+ watchdog_unregister_device(&wdt->wdd);
err_exit:
starfive_wdt_disable_clock(wdt);
pm_runtime_disable(&pdev->dev);
--
2.50.1.windows.1