FAILED: patch "[PATCH] spi: s3c64xx: fix controller deregistration" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] spi: s3c64xx: fix controller deregistration" failed to apply to 5.15-stable tree

[gregkh]

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 <stable@vger.kernel.org>.

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 c1446b61e472da24d1547525193467b4bea4a7cb
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026051500-scribe-coyness-349f@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From c1446b61e472da24d1547525193467b4bea4a7cb Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Fri, 10 Apr 2026 10:17:41 +0200
Subject: [PATCH] spi: s3c64xx: fix controller deregistration

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

Fixes: 91800f0e9005 ("spi/s3c64xx: Use managed registration")
Cc: stable@vger.kernel.org	# 3.13: 76fbad410c0f
Cc: stable@vger.kernel.org	# 3.13
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410081757.503099-12-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index ba85243d6d89..95b61264b679 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -1369,7 +1369,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
 	       S3C64XX_SPI_INT_TX_OVERRUN_EN | S3C64XX_SPI_INT_TX_UNDERRUN_EN,
 	       sdd->regs + S3C64XX_SPI_INT_EN);
 
-	ret = devm_spi_register_controller(&pdev->dev, host);
+	ret = spi_register_controller(host);
 	if (ret != 0) {
 		dev_err(&pdev->dev, "cannot register SPI host: %d\n", ret);
 		goto err_pm_put;
@@ -1399,6 +1399,8 @@ static void s3c64xx_spi_remove(struct platform_device *pdev)
 
 	pm_runtime_get_sync(&pdev->dev);
 
+	spi_unregister_controller(host);
+
 	writel(0, sdd->regs + S3C64XX_SPI_INT_EN);
 
 	if (!is_polling(sdd)) {