watchdog: rti-wdt: Fix pm_runtime_get_sync() error checking

[ Upstream commit b3ac0c58fa8934926360268f3d89ec7680644d7b ]

If the device is already in a runtime PM enabled state
pm_runtime_get_sync() will return 1, so a test for negative
value should be used to check for errors.

Fixes: 2d63908bdbfb ("watchdog: Add K3 RTI watchdog support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220412070824.23708-1-linmq006@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/watchdog/rti_wdt.c b/drivers/watchdog/rti_wdt.c
index ae7f935..46c2a4b 100644 (file)
--- a/drivers/watchdog/rti_wdt.c
+++ b/drivers/watchdog/rti_wdt.c
@@ -227,7 +227,7 @@ static int rti_wdt_probe(struct platform_device *pdev)
 
        pm_runtime_enable(dev);
        ret = pm_runtime_get_sync(dev);
-       if (ret) {
+       if (ret < 0) {
                pm_runtime_put_noidle(dev);
                pm_runtime_disable(&pdev->dev);
                return dev_err_probe(dev, ret, "runtime pm failed\n");