linux-kernel - [PATCH] thermal-generic-adc: Silent error message for EPROBE

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Message-Id: <20190910075907.132200-1-hsinyi@chromium.org>
Date:   Tue, 10 Sep 2019 15:59:07 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Eduardo Valentin <edubezval@...il.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Jonathan Cameron <jic23@...nel.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] thermal-generic-adc: Silent error message for EPROBE_DEFER

If devm_iio_channel_get() or devm_thermal_zone_of_sensor_register()
fail with EPROBE_DEFER, we shouldn't print an error message, as the
device will be probed again later.

Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
---
 drivers/thermal/thermal-generic-adc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/thermal-generic-adc.c b/drivers/thermal/thermal-generic-adc.c
index dcecf2e8dc8e..ae5743c9a894 100644
--- a/drivers/thermal/thermal-generic-adc.c
+++ b/drivers/thermal/thermal-generic-adc.c
@@ -134,7 +134,8 @@ static int gadc_thermal_probe(struct platform_device *pdev)
 	gti->channel = devm_iio_channel_get(&pdev->dev, "sensor-channel");
 	if (IS_ERR(gti->channel)) {
 		ret = PTR_ERR(gti->channel);
-		dev_err(&pdev->dev, "IIO channel not found: %d\n", ret);
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "IIO channel not found: %d\n", ret);
 		return ret;
 	}
 
@@ -142,8 +143,10 @@ static int gadc_thermal_probe(struct platform_device *pdev)
 							   &gadc_thermal_ops);
 	if (IS_ERR(gti->tz_dev)) {
 		ret = PTR_ERR(gti->tz_dev);
-		dev_err(&pdev->dev, "Thermal zone sensor register failed: %d\n",
-			ret);
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"Thermal zone sensor register failed: %d\n",
+				ret);
 		return ret;
 	}
 
-- 
2.23.0.162.g0b9fbb3734-goog