FAILED: patch "[PATCH] spi: sh-msiof: fix controller deregistration" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-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-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 45170f67a08b912ead6ccc387ba06954d1d4e53a
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026051555-segment-geiger-1f79@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 45170f67a08b912ead6ccc387ba06954d1d4e53a Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Fri, 10 Apr 2026 10:17:43 +0200
Subject: [PATCH] spi: sh-msiof: fix controller deregistration

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

index 7f3e08810560..f114b6313f4f 100644
@@ -1289,9 +1289,9 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		dev_warn(dev, "DMA not available, using PIO\n");
 
-	ret = devm_spi_register_controller(dev, ctlr);
+	ret = spi_register_controller(ctlr);
 	if (ret < 0) {
-		dev_err(dev, "devm_spi_register_controller error.\n");
+		dev_err(dev, "failed to register controller\n");
 		goto err2;
 	}
 

@@ -1309,8 +1309,14 @@ static void sh_msiof_spi_remove(struct platform_device *pdev)
 {
 	struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev);
 
+	spi_controller_get(p->ctlr);
+
+	spi_unregister_controller(p->ctlr);
+
 	sh_msiof_release_dma(p);
 	pm_runtime_disable(&pdev->dev);
+
+	spi_controller_put(p->ctlr);
 }
 
 static const struct platform_device_id spi_driver_ids[] = {