[PATCH v4 1/5] thermal/drivers/loongson2: Correct thermal sensor registration loop

The registration loop in loongson2_thermal_probe() incorrectly uses
dev_err_probe() when the sensor is not present (-ENODEV). In that case,
the driver should continue to the next sensor index rather than treating
it as a fatal error.

Fix this by correctly handling -ENODEV and only returning on other
errors. Also add a final check to ensure at least one thermal zone was
registered.

Cc: [email protected]
Reported-by: Sashiko <[email protected]>
Closes: https://sashiko.dev/#/patchset/[email protected]?part=2
Fixes: e7e3a7c35791 ("thermal/drivers/loongson-2: Add thermal management support")
Signed-off-by: Binbin Zhou <[email protected]>
---
 drivers/thermal/loongson2_thermal.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/loongson2_thermal.c b/drivers/thermal/loongson2_thermal.c
index ea4dd2fb1f47..5f47fa51fb90 100644
--- a/drivers/thermal/loongson2_thermal.c
+++ b/drivers/thermal/loongson2_thermal.c
@@ -161,16 +161,18 @@ static int loongson2_thermal_probe(struct platform_device *pdev)
 
 	for (i = 0; i <= LOONGSON2_MAX_SENSOR_SEL_NUM; i++) {
 		tzd = devm_thermal_of_zone_register(dev, i, data, thermal_ops);
-
 		if (!IS_ERR(tzd))
 			break;
 
-		if (PTR_ERR(tzd) != -ENODEV)
+		if (PTR_ERR(tzd) == -ENODEV)
 			continue;
 
-		return dev_err_probe(dev, PTR_ERR(tzd), "failed to register");
+		return dev_err_probe(dev, PTR_ERR(tzd), "failed to register sensor %d\n", i);
 	}
 
+	if (IS_ERR(tzd))
+		return dev_err_probe(dev, -ENODEV, "No thermal sensor registered\n");
+
 	ret = devm_request_threaded_irq(dev, irq, NULL, loongson2_thermal_irq_thread,
 					IRQF_ONESHOT, "loongson2_thermal", tzd);
 	if (ret < 0)
-- 
2.52.0