spi: cadence: fix unclocked access on unbind

commit 5b1689a upstream.

Make sure that the controller is runtime resumed before disabling it
during driver unbind to avoid unclocked register access and unbalanced
clock disable.

Also restore the autosuspend setting.

This issue was flagged by Sashiko when reviewing a controller
deregistration fix.

Fixes: d36ccd9 ("spi: cadence: Runtime pm adaptation")
Cc: stable@vger.kernel.org	# 4.7
Cc: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Link: https://sashiko.dev/#/patchset/20260414134319.978196-1-johan%40kernel.org?part=1
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260421123615.1533617-2-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-cadence.c

@@ -685,16 +685,23 @@ static void cdns_spi_remove(struct platform_device *pdev)
 {
 	struct spi_controller *ctlr = platform_get_drvdata(pdev);
 	struct cdns_spi *xspi = spi_controller_get_devdata(ctlr);
+	int ret = 0;
+
+	if (!spi_controller_is_target(ctlr))
+		ret = pm_runtime_get_sync(&pdev->dev);
 
 	spi_controller_get(ctlr);
 
 	spi_unregister_controller(ctlr);
 
-	cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_DISABLE);
+	if (ret >= 0)
+		cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_DISABLE);
 
 	if (!spi_controller_is_target(ctlr)) {
 		pm_runtime_disable(&pdev->dev);
 		pm_runtime_set_suspended(&pdev->dev);
+		pm_runtime_put_noidle(&pdev->dev);
+		pm_runtime_dont_use_autosuspend(&pdev->dev);
 	}
 
 	spi_controller_put(ctlr);