FAILED: patch "[PATCH] spi: ep93xx: fix controller deregistration" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x f4838934b695a58eda0833583cb8028e73a19529
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026051506-eggshell-large-8572@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From f4838934b695a58eda0833583cb8028e73a19529 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Thu, 9 Apr 2026 14:04:11 +0200
Subject: [PATCH] spi: ep93xx: fix controller deregistration

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

index 90d5f3ea6508..db50018050e5 100644
@@ -689,7 +689,7 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
 	/* make sure that the hardware is disabled */
 	writel(0, espi->mmio + SSPCR1);
 
-	error = devm_spi_register_controller(&pdev->dev, host);
+	error = spi_register_controller(host);
 	if (error) {
 		dev_err(&pdev->dev, "failed to register SPI host\n");
 		goto fail_free_dma;

@@ -713,7 +713,13 @@ static void ep93xx_spi_remove(struct platform_device *pdev)
 	struct spi_controller *host = platform_get_drvdata(pdev);
 	struct ep93xx_spi *espi = spi_controller_get_devdata(host);
 
+	spi_controller_get(host);
+
+	spi_unregister_controller(host);
+
 	ep93xx_spi_release_dma(espi);
+
+	spi_controller_put(host);
 }
 
 static const struct of_device_id ep93xx_spi_of_ids[] = {