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From:   Frank Li <Frank.Li@nxp.com>
To:     "Rafael J. Wysocki" <rafael@kernel.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Amit Kucheria <amitk@kernel.org>,
        Zhang Rui <rui.zhang@intel.com>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
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        Fabio Estevam <festevam@gmail.com>,
        NXP Linux Team <linux-imx@nxp.com>,
        linux-pm@vger.kernel.org (open list:THERMAL),
        linux-arm-kernel@lists.infradead.org (moderated list:ARM/FREESCALE IMX
        / MXC ARM ARCHITECTURE), linux-kernel@vger.kernel.org (open list)
Cc:     imx@lists.linux.dev
Subject: [PATCH 1/1] thermal/drivers/imx_sc_thermal: return -EAGAIN when SCFW turn off resource
Date:   Wed, 12 Jul 2023 17:05:04 -0400
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Avoid endless print following message when SCFW turns off resource.
 [ 1818.342337] thermal thermal_zone0: failed to read out thermal zone (-1)

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/thermal/imx_sc_thermal.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/imx_sc_thermal.c b/drivers/thermal/imx_sc_thermal.c
index 8d6b4ef23746..0533d58f199f 100644
--- a/drivers/thermal/imx_sc_thermal.c
+++ b/drivers/thermal/imx_sc_thermal.c
@@ -58,7 +58,9 @@ static int imx_sc_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
 	hdr->size = 2;
 
 	ret = imx_scu_call_rpc(thermal_ipc_handle, &msg, true);
-	if (ret)
+	if (ret == -EPERM) /* NO POWER */
+		return -EAGAIN;
+	else if (ret)
 		return ret;
 
 	*temp = msg.data.resp.celsius * 1000 + msg.data.resp.tenths * 100;
-- 
2.34.1