linux-kernel - [PATCH 4.19 213/287] bus: ti-sysc: Fix warnings for unbind for serial

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Message-Id: <20220613094930.321973001@linuxfoundation.org>
Date:   Mon, 13 Jun 2022 12:10:37 +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, Romain Naour <romain.naour@...le.fr>,
        Tony Lindgren <tony@...mide.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 213/287] bus: ti-sysc: Fix warnings for unbind for serial

From: Tony Lindgren <tony@...mide.com>

[ Upstream commit c337125b8834f9719dfda0e40b25eaa266f1b8cf ]

We can get "failed to disable" clock_unprepare warnings on unbind at least
for the serial console device if the unbind is done before the device has
been idled.

As some devices are using deferred idle, we must check the status for
pending idle work to idle the device.

Fixes: 76f0f772e469 ("bus: ti-sysc: Improve handling for no-reset-on-init and no-idle-on-init")
Cc: Romain Naour <romain.naour@...le.fr>
Reviewed-by: Romain Naour <romain.naour@...le.fr>
Signed-off-by: Tony Lindgren <tony@...mide.com>
Link: https://lore.kernel.org/r/20220512053021.61650-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/bus/ti-sysc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index b6a278183d82..bc274ddb9767 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1801,7 +1801,9 @@ static int sysc_remove(struct platform_device *pdev)
 	struct sysc *ddata = platform_get_drvdata(pdev);
 	int error;
 
-	cancel_delayed_work_sync(&ddata->idle_work);
+	/* Device can still be enabled, see deferred idle quirk in probe */
+	if (cancel_delayed_work_sync(&ddata->idle_work))
+		ti_sysc_idle(&ddata->idle_work.work);
 
 	error = pm_runtime_get_sync(ddata->dev);
 	if (error < 0) {
-- 
2.35.1