[PATCH 13/20] spi: fsl-espi: fix controller deregistration

[Johan Hovold <johan@kernel.org>]

Make sure to deregister the controller before disabling runtime PM
(which can leave the controller disabled) to allow SPI device drivers to
do I/O during deregistration.

Fixes: e9abb4db8d10 ("spi: fsl-espi: add runtime PM")
Cc: stable@vger.kernel.org	# 4.3
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/spi/spi-fsl-espi.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index 56270f8fdc17..45b9974ae911 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -718,7 +718,7 @@ static int fsl_espi_probe(struct device *dev, struct resource *mem,
 	pm_runtime_enable(dev);
 	pm_runtime_get_sync(dev);
 
-	ret = devm_spi_register_controller(dev, host);
+	ret = spi_register_controller(host);
 	if (ret < 0)
 		goto err_pm;
 
@@ -782,7 +782,15 @@ static int of_fsl_espi_probe(struct platform_device *ofdev)
 
 static void of_fsl_espi_remove(struct platform_device *dev)
 {
+	struct spi_controller *host = platform_get_drvdata(dev);
+
+	spi_controller_get(host);
+
+	spi_unregister_controller(host);
+
 	pm_runtime_disable(&dev->dev);
+
+	spi_controller_put(host);
 }
 
 #ifdef CONFIG_PM_SLEEP
-- 
2.52.0