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

[<gregkh@linuxfoundation.org>]

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 dbb6b01267c0c866eaac4019cec19f414beec61d
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026051512-stingily-blurred-d42b@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From dbb6b01267c0c866eaac4019cec19f414beec61d Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Thu, 9 Apr 2026 14:04:08 +0200
Subject: [PATCH] spi: cavium-thunderx: fix controller deregistration

Make sure to deregister the controller before disabling it to avoid
hanging or leaking resources associated with the queue when the queue
non-empty.

Fixes: 7347a6c7af8d ("spi: octeon: Add ThunderX driver")
Cc: stable@vger.kernel.org	# 4.9
Cc: Jan Glauber <jan.glauber@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260409120419.388546-10-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-cavium-thunderx.c b/drivers/spi/spi-cavium-thunderx.c
index 99aac40a1bba..f1a9aa696c87 100644
--- a/drivers/spi/spi-cavium-thunderx.c
+++ b/drivers/spi/spi-cavium-thunderx.c
@@ -70,7 +70,7 @@ static int thunderx_spi_probe(struct pci_dev *pdev,
 
 	pci_set_drvdata(pdev, host);
 
-	ret = devm_spi_register_controller(dev, host);
+	ret = spi_register_controller(host);
 	if (ret)
 		goto error;
 
@@ -90,8 +90,14 @@ static void thunderx_spi_remove(struct pci_dev *pdev)
 	if (!p)
 		return;
 
+	spi_controller_get(host);
+
+	spi_unregister_controller(host);
+
 	/* Put everything in a known state. */
 	writeq(0, p->register_base + OCTEON_SPI_CFG(p));
+
+	spi_controller_put(host);
 }
 
 static const struct pci_device_id thunderx_spi_pci_id_table[] = {