[PATCH] spi: sun6i: disable/unprepare clocks on remove

[PATCH] spi: sun6i: disable/unprepare clocks on remove

[Tobias Jordan]

sun6i_spi_probe() uses sun6i_spi_runtime_resume() to prepare/enable
clocks, so sun6i_spi_remove() should use sun6i_spi_runtime_suspend() to
disable/unprepare them if we're not suspended.
Replacing pm_runtime_disable() by pm_runtime_force_suspend() will ensure
that sun6i_spi_runtime_suspend() is called if needed.

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 3558fe900e8af spi: sunxi: Add Allwinner A31 SPI controller driver
Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com>
---
Found by LDV and discussed as RFC before; compile-tested.

 drivers/spi/spi-sun6i.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
index fb38234249a8..8533f4edd00a 100644
--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -541,7 +541,7 @@ static int sun6i_spi_probe(struct platform_device *pdev)
 
 static int sun6i_spi_remove(struct platform_device *pdev)
 {
-	pm_runtime_disable(&pdev->dev);
+	pm_runtime_force_suspend(&pdev->dev);
 
 	return 0;
 }
-- 
2.11.0

[PATCH] spi: sun6i: disable/unprepare clocks on remove

[Maxime Ripard]

On Thu, Dec 07, 2017 at 03:04:53PM +0100, Tobias Jordan wrote:
> sun6i_spi_probe() uses sun6i_spi_runtime_resume() to prepare/enable
> clocks, so sun6i_spi_remove() should use sun6i_spi_runtime_suspend() to
> disable/unprepare them if we're not suspended.
> Replacing pm_runtime_disable() by pm_runtime_force_suspend() will ensure
> that sun6i_spi_runtime_suspend() is called if needed.
> 
> Found by Linux Driver Verification project (linuxtesting.org).
> 
> Fixes: 3558fe900e8af spi: sunxi: Add Allwinner A31 SPI controller driver

This isn't the proper fixes format.

> Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com>

Once fixed,
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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Applied "spi: sun6i: disable/unprepare clocks on remove" to the spi tree

[Mark Brown]

The patch

   spi: sun6i: disable/unprepare clocks on remove

has been applied to the spi tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 2d9bbd02c54094ceffa555143b0d68cd06504d63 Mon Sep 17 00:00:00 2001
From: Tobias Jordan <Tobias.Jordan@elektrobit.com>
Date: Thu, 7 Dec 2017 15:04:53 +0100
Subject: [PATCH] spi: sun6i: disable/unprepare clocks on remove

sun6i_spi_probe() uses sun6i_spi_runtime_resume() to prepare/enable
clocks, so sun6i_spi_remove() should use sun6i_spi_runtime_suspend() to
disable/unprepare them if we're not suspended.
Replacing pm_runtime_disable() by pm_runtime_force_suspend() will ensure
that sun6i_spi_runtime_suspend() is called if needed.

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 3558fe900e8af (spi: sunxi: Add Allwinner A31 SPI controller driver)
Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-sun6i.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
index fb38234249a8..8533f4edd00a 100644
--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -541,7 +541,7 @@ static int sun6i_spi_probe(struct platform_device *pdev)
 
 static int sun6i_spi_remove(struct platform_device *pdev)
 {
-	pm_runtime_disable(&pdev->dev);
+	pm_runtime_force_suspend(&pdev->dev);
 
 	return 0;
 }
-- 
2.15.1