spi: s3c64xx: fix controller deregistration

commit c1446b6 upstream.

Make sure to deregister the controller before releasing underlying
resources like DMA during driver unbind.

Fixes: 91800f0 ("spi/s3c64xx: Use managed registration")
Cc: stable@vger.kernel.org	# 3.13: 76fbad4
Cc: stable@vger.kernel.org	# 3.13
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410081757.503099-12-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: jhovold

drivers/spi/spi-s3c64xx.c

@@ -1305,7 +1305,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
 	       S3C64XX_SPI_INT_TX_OVERRUN_EN | S3C64XX_SPI_INT_TX_UNDERRUN_EN,
 	       sdd->regs + S3C64XX_SPI_INT_EN);
 
-	ret = devm_spi_register_controller(&pdev->dev, host);
+	ret = spi_register_controller(host);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "cannot register SPI host: %d\n", ret);
 		goto err_pm_put;
@@ -1336,6 +1336,8 @@ static void s3c64xx_spi_remove(struct platform_device *pdev)
 
 	pm_runtime_get_sync(&pdev->dev);
 
+	spi_unregister_controller(host);
+
 	writel(0, sdd->regs + S3C64XX_SPI_INT_EN);
 
 	pm_runtime_put_noidle(&pdev->dev);