FAILED: patch "[PATCH] spi: pic32: fix controller deregistration" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-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-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 6b627bfe0c44e064aba464839e430dc1ca2b0bb8
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026051535-relight-glaring-e6e5@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 6b627bfe0c44e064aba464839e430dc1ca2b0bb8 Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Fri, 10 Apr 2026 10:17:36 +0200
Subject: [PATCH] spi: pic32: fix controller deregistration

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

index 369850d14313..70427e529945 100644
@@ -821,7 +821,7 @@ static int pic32_spi_probe(struct platform_device *pdev)
 	}
 
 	/* register host */
-	ret = devm_spi_register_controller(&pdev->dev, host);
+	ret = spi_register_controller(host);
 	if (ret) {
 		dev_err(&host->dev, "failed registering spi host\n");
 		goto err_bailout;

@@ -840,11 +840,16 @@ static int pic32_spi_probe(struct platform_device *pdev)
 
 static void pic32_spi_remove(struct platform_device *pdev)
 {
-	struct pic32_spi *pic32s;
+	struct pic32_spi *pic32s = platform_get_drvdata(pdev);
+
+	spi_controller_get(pic32s->host);
+
+	spi_unregister_controller(pic32s->host);
 
-	pic32s = platform_get_drvdata(pdev);
 	pic32_spi_disable(pic32s);
 	pic32_spi_dma_unprep(pic32s);
+
+	spi_controller_put(pic32s->host);
 }
 
 static const struct of_device_id pic32_spi_of_match[] = {