FAILED: patch "[PATCH] spi: cadence: 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 666fa7e9ca98e71c880086ca24147ae843f1ed6e
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026051556-anvil-uncouple-5df3@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 666fa7e9ca98e71c880086ca24147ae843f1ed6e Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Tue, 14 Apr 2026 15:43:12 +0200
Subject: [PATCH] spi: cadence: fix controller deregistration

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

index caa7a57e6d27..08d7dabe818d 100644
@@ -777,6 +777,10 @@ 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);
 
+	spi_controller_get(ctlr);
+
+	spi_unregister_controller(ctlr);
+
 	cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_DISABLE);
 
 	if (!spi_controller_is_target(ctlr)) {

@@ -784,7 +788,7 @@ static void cdns_spi_remove(struct platform_device *pdev)
 		pm_runtime_set_suspended(&pdev->dev);
 	}
 
-	spi_unregister_controller(ctlr);
+	spi_controller_put(ctlr);
 }
 
 /**