FAILED: patch "[PATCH] spi: mt65xx: fix controller deregistration" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] spi: mt65xx: 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 2ad30599cccc572ba2fc11010670eb6e01ea6bfc
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026051551-tablet-confound-84e5@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From 2ad30599cccc572ba2fc11010670eb6e01ea6bfc Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Fri, 10 Apr 2026 10:17:31 +0200
Subject: [PATCH] spi: mt65xx: fix controller deregistration

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

Fixes: a568231f4632 ("spi: mediatek: Add spi bus for Mediatek MT8173")
Cc: stable@vger.kernel.org	# 4.3: ace145802350
Cc: stable@vger.kernel.org	# 4.3
Cc: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410081757.503099-2-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 0368a26bca9a..96f8555be983 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -1325,7 +1325,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(dev);
 
-	ret = devm_spi_register_controller(dev, host);
+	ret = spi_register_controller(host);
 	if (ret) {
 		pm_runtime_disable(dev);
 		return dev_err_probe(dev, ret, "failed to register host\n");
@@ -1340,6 +1340,8 @@ static void mtk_spi_remove(struct platform_device *pdev)
 	struct mtk_spi *mdata = spi_controller_get_devdata(host);
 	int ret;
 
+	spi_unregister_controller(host);
+
 	cpu_latency_qos_remove_request(&mdata->qos_request);
 	if (mdata->use_spimem && !completion_done(&mdata->spimem_done))
 		complete(&mdata->spimem_done);