linux-kernel - [PATCH v4 2/2] thermal: rcar_gen3_thermal: disable interrupt in .remove

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Date:   Wed, 24 Apr 2019 14:11:45 +0900
From:   Jiada Wang <jiada_wang@...tor.com>
To:     <rui.zhang@...el.com>, <edubezval@...il.com>,
        <daniel.lezcano@...aro.org>
CC:     <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <jiada_wang@...tor.com>, <horms+renesas@...ge.net.au>,
        <niklas.soderlund+renesas@...natech.se>, <geert+renesas@...der.be>,
        <sergei.shtylyov@...entembedded.com>,
        <marek.vasut+renesas@...il.com>,
        <kuninori.morimoto.gx@...esas.com>, <hien.dang.eb@...esas.com>,
        <fabrizio.castro@...renesas.com>, <dien.pham.ry@...esas.com>,
        <biju.das@...renesas.com>, <erosca@...adit-jv.com>,
        <george_davis@...tor.com>, <joshua_frkuska@...tor.com>
Subject: [PATCH v4 2/2] thermal: rcar_gen3_thermal: disable interrupt in .remove

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>
---
 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 065e16f53285..280230951dfe 100644
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -307,6 +307,9 @@ 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);
-- 
2.19.2