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Message-Id: <20200428182226.762089564@linuxfoundation.org>
Date: Tue, 28 Apr 2020 20:23:08 +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,
Geert Uytterhoeven <geert+renesas@...der.be>,
Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Thierry Reding <thierry.reding@...il.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.6 012/167] pwm: rcar: Fix late Runtime PM enablement
From: Geert Uytterhoeven <geert+renesas@...der.be>
[ Upstream commit 1451a3eed24b5fd6a604683f0b6995e0e7e16c79 ]
Runtime PM should be enabled before calling pwmchip_add(), as PWM users
can appear immediately after the PWM chip has been added.
Likewise, Runtime PM should be disabled after the removal of the PWM
chip.
Fixes: ed6c1476bf7f16d5 ("pwm: Add support for R-Car PWM Timer")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Thierry Reding <thierry.reding@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/pwm/pwm-rcar.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c
index 2685577b6dd45..7ab9eb6616d95 100644
--- a/drivers/pwm/pwm-rcar.c
+++ b/drivers/pwm/pwm-rcar.c
@@ -229,24 +229,28 @@ static int rcar_pwm_probe(struct platform_device *pdev)
rcar_pwm->chip.base = -1;
rcar_pwm->chip.npwm = 1;
+ pm_runtime_enable(&pdev->dev);
+
ret = pwmchip_add(&rcar_pwm->chip);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register PWM chip: %d\n", ret);
+ pm_runtime_disable(&pdev->dev);
return ret;
}
- pm_runtime_enable(&pdev->dev);
-
return 0;
}
static int rcar_pwm_remove(struct platform_device *pdev)
{
struct rcar_pwm_chip *rcar_pwm = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = pwmchip_remove(&rcar_pwm->chip);
pm_runtime_disable(&pdev->dev);
- return pwmchip_remove(&rcar_pwm->chip);
+ return ret;
}
static const struct of_device_id rcar_pwm_of_table[] = {
--
2.20.1
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