linux-kernel - [PATCH 4.19 017/118] thermal: rcar_gen3_thermal: disable interrupt in .remove

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Date:   Thu, 13 Jun 2019 10:32:35 +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, Jiada Wang <jiada_wang@...tor.com>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Eduardo Valentin <edubezval@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 017/118] thermal: rcar_gen3_thermal: disable interrupt in .remove

[ Upstream commit 63f55fcea50c25ae5ad45af92d08dae3b84534c2 ]

Currently IRQ remains enabled after .remove, later if device is probed,
IRQ is requested before .thermal_init, this may cause IRQ function be
called before device is initialized.

this patch disables interrupt in .remove, to ensure irq function
only be called after device is fully initialized.

Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
Reviewed-by: Simon Horman <horms+renesas@...ge.net.au>
Reviewed-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Eduardo Valentin <edubezval@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/thermal/rcar_gen3_thermal.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
index 7aed5337bdd3..704c8ad045bb 100644
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -328,6 +328,9 @@ MODULE_DEVICE_TABLE(of, rcar_gen3_thermal_dt_ids);
 static int rcar_gen3_thermal_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct rcar_gen3_thermal_priv *priv = dev_get_drvdata(dev);
+
+	rcar_thermal_irq_set(priv, false);
 
 	pm_runtime_put(dev);
 	pm_runtime_disable(dev);
-- 
2.20.1