spi: st-ssc4: fix controller deregistration

commit 1985737 upstream.

Make sure to deregister the controller before disabling underlying
resources like clocks during driver unbind.

Fixes: 9e86237 ("spi: Add new driver for STMicroelectronics' SPI Controller")
Cc: stable@vger.kernel.org	# 4.0
Cc: Lee Jones <lee@kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410081757.503099-18-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-st-ssc4.c

@@ -349,7 +349,7 @@ static int spi_st_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, host);
 
-	ret = devm_spi_register_controller(&pdev->dev, host);
+	ret = spi_register_controller(host);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register host\n");
 		goto rpm_disable;
@@ -371,10 +371,16 @@ static void spi_st_remove(struct platform_device *pdev)
 	struct spi_controller *host = platform_get_drvdata(pdev);
 	struct spi_st *spi_st = spi_controller_get_devdata(host);
 
+	spi_controller_get(host);
+
+	spi_unregister_controller(host);
+
 	pm_runtime_disable(&pdev->dev);
 
 	clk_disable_unprepare(spi_st->clk);
 
+	spi_controller_put(host);
+
 	pinctrl_pm_select_sleep_state(&pdev->dev);
 }