[PATCH AUTOSEL 4.19 083/146] thermal: rcar_thermal: Prevent doing work after unbind

From: Sasha Levin
Date: Wed Oct 31 2018 - 19:07:03 EST

From: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

[ Upstream commit 697ee786f15d7b65c7f3045d45fe3a05d28e0911 ]

When testing bind/unbind on r8a7791/koelsch:

WARNING: CPU: 1 PID: 697 at lib/debugobjects.c:329 debug_print_object+0x8c/0xb4
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x10

This happens if the workqueue runs after the device has been unbound.
Fix this by cancelling any queued work during remove.

Fixes: e0a5172e9eec7f0d ("thermal: rcar: add interrupt support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: Niklas SÃderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
Signed-off-by: Eduardo Valentin <edubezval@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/thermal/rcar_thermal.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index 78f932822d38..8df2ce94c28d 100644
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -453,6 +453,7 @@ static int rcar_thermal_remove(struct platform_device *pdev)

rcar_thermal_for_each_priv(priv, common) {
+ cancel_delayed_work_sync(&priv->work);
if (priv->chip->use_of_thermal)