linux-kernel - [PATCH 5.14 023/100] thermal/drivers/qcom/spmi-adc-tm5: Dont abort probing if a sensor is not used

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Date:   Fri, 24 Sep 2021 14:43:32 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Matthias Kaehlcke <mka@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: [PATCH 5.14 023/100] thermal/drivers/qcom/spmi-adc-tm5: Dont abort probing if a sensor is not used

From: Matthias Kaehlcke <mka@...omium.org>

commit 70ee251ded6ba24c15537f4abb8a318e233d0d1a upstream.

adc_tm5_register_tzd() registers the thermal zone sensors for all
channels of the thermal monitor. If the registration of one channel
fails the function skips the processing of the remaining channels
and returns an error, which results in _probe() being aborted.

One of the reasons the registration could fail is that none of the
thermal zones is using the channel/sensor, which hardly is a critical
error (if it is an error at all). If this case is detected emit a
warning and continue with processing the remaining channels.

Fixes: ca66dca5eda6 ("thermal: qcom: add support for adc-tm5 PMIC thermal monitor")
Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
Reported-by: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Link: https://lore.kernel.org/r/20210823134726.1.I1dd23ddf77e5b3568625d80d6827653af071ce19@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/thermal/qcom/qcom-spmi-adc-tm5.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/thermal/qcom/qcom-spmi-adc-tm5.c
+++ b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c
@@ -359,6 +359,12 @@ static int adc_tm5_register_tzd(struct a
 							   &adc_tm->channels[i],
 							   &adc_tm5_ops);
 		if (IS_ERR(tzd)) {
+			if (PTR_ERR(tzd) == -ENODEV) {
+				dev_warn(adc_tm->dev, "thermal sensor on channel %d is not used\n",
+					 adc_tm->channels[i].channel);
+				continue;
+			}
+
 			dev_err(adc_tm->dev, "Error registering TZ zone for channel %d: %ld\n",
 				adc_tm->channels[i].channel, PTR_ERR(tzd));
 			return PTR_ERR(tzd);