FAILED: patch "[PATCH] spi: microchip-core-qspi: fix controller deregistration" failed to apply to 6.6-stable tree

FAILED: patch "[PATCH] spi: microchip-core-qspi: fix controller deregistration" failed to apply to 6.6-stable tree

[gregkh]

The patch below does not apply to the 6.6-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-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x e6464140d439f2d42f072eb422a5b1fec470c5a6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026051251-shrimp-duller-1ca2@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

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

From e6464140d439f2d42f072eb422a5b1fec470c5a6 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Thu, 9 Apr 2026 14:04:17 +0200
Subject: [PATCH] spi: microchip-core-qspi: fix controller deregistration

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

Fixes: 8596124c4c1b ("spi: microchip-core-qspi: Add support for microchip fpga qspi controllers")
Cc: stable@vger.kernel.org	# 6.1
Cc: Naga Sureshkumar Relli <nagasuresh.relli@microchip.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260409120419.388546-19-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-microchip-core-qspi.c b/drivers/spi/spi-microchip-core-qspi.c
index aafe6cbf2aea..eab059fb0bc2 100644
--- a/drivers/spi/spi-microchip-core-qspi.c
+++ b/drivers/spi/spi-microchip-core-qspi.c
@@ -692,7 +692,7 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	qspi = spi_controller_get_devdata(ctlr);
-	platform_set_drvdata(pdev, qspi);
+	platform_set_drvdata(pdev, ctlr);
 
 	qspi->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(qspi->regs))
@@ -732,7 +732,7 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 	ctlr->num_chipselect = 2;
 	ctlr->use_gpio_descriptors = true;
 
-	ret = devm_spi_register_controller(&pdev->dev, ctlr);
+	ret = spi_register_controller(ctlr);
 	if (ret)
 		return dev_err_probe(&pdev->dev, ret,
 				     "spi_register_controller failed\n");
@@ -742,9 +742,13 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 
 static void mchp_coreqspi_remove(struct platform_device *pdev)
 {
-	struct mchp_coreqspi *qspi = platform_get_drvdata(pdev);
-	u32 control = readl_relaxed(qspi->regs + REG_CONTROL);
+	struct spi_controller *ctlr = platform_get_drvdata(pdev);
+	struct mchp_coreqspi *qspi = spi_controller_get_devdata(ctlr);
+	u32 control;
 
+	spi_unregister_controller(ctlr);
+
+	control = readl_relaxed(qspi->regs + REG_CONTROL);
 	mchp_coreqspi_disable_ints(qspi);
 	control &= ~CONTROL_ENABLE;
 	writel_relaxed(control, qspi->regs + REG_CONTROL);

[PATCH 6.6.y 1/2] spi: microchip-core-qspi: Use helper function devm_clk_get_enabled()

[Sasha Levin]

From: Li Zetao <lizetao1@huawei.com>

[ Upstream commit e922f3fff21445117e9196bd8e940ad8e15ca8c7 ]

Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared
and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be
replaced by devm_clk_get_enabled() when driver enables (and possibly
prepares) the clocks for the whole lifetime of the device. Moreover, it is
no longer necessary to unprepare and disable the clocks explicitly.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Link: https://lore.kernel.org/r/20230823133938.1359106-18-lizetao1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: e6464140d439 ("spi: microchip-core-qspi: fix controller deregistration")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/spi/spi-microchip-core-qspi.c | 29 +++++++--------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/drivers/spi/spi-microchip-core-qspi.c b/drivers/spi/spi-microchip-core-qspi.c
index 32a0fa4ba50f7..0e44683d5ab5e 100644
--- a/drivers/spi/spi-microchip-core-qspi.c
+++ b/drivers/spi/spi-microchip-core-qspi.c
@@ -519,30 +519,23 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(qspi->regs),
 				     "failed to map registers\n");
 
-	qspi->clk = devm_clk_get(&pdev->dev, NULL);
+	qspi->clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(qspi->clk))
 		return dev_err_probe(&pdev->dev, PTR_ERR(qspi->clk),
 				     "could not get clock\n");
 
-	ret = clk_prepare_enable(qspi->clk);
-	if (ret)
-		return dev_err_probe(&pdev->dev, ret,
-				     "failed to enable clock\n");
-
 	init_completion(&qspi->data_completion);
 	mutex_init(&qspi->op_lock);
 
 	qspi->irq = platform_get_irq(pdev, 0);
-	if (qspi->irq < 0) {
-		ret = qspi->irq;
-		goto out;
-	}
+	if (qspi->irq < 0)
+		return qspi->irq;
 
 	ret = devm_request_irq(&pdev->dev, qspi->irq, mchp_coreqspi_isr,
 			       IRQF_SHARED, pdev->name, qspi);
 	if (ret) {
 		dev_err(&pdev->dev, "request_irq failed %d\n", ret);
-		goto out;
+		return ret;
 	}
 
 	ctlr->bits_per_word_mask = SPI_BPW_MASK(8);
@@ -553,18 +546,11 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 	ctlr->dev.of_node = np;
 
 	ret = devm_spi_register_controller(&pdev->dev, ctlr);
-	if (ret) {
-		dev_err_probe(&pdev->dev, ret,
-			      "spi_register_controller failed\n");
-		goto out;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "spi_register_controller failed\n");
 
 	return 0;
-
-out:
-	clk_disable_unprepare(qspi->clk);
-
-	return ret;
 }
 
 static void mchp_coreqspi_remove(struct platform_device *pdev)
@@ -575,7 +561,6 @@ static void mchp_coreqspi_remove(struct platform_device *pdev)
 	mchp_coreqspi_disable_ints(qspi);
 	control &= ~CONTROL_ENABLE;
 	writel_relaxed(control, qspi->regs + REG_CONTROL);
-	clk_disable_unprepare(qspi->clk);
 }
 
 static const struct of_device_id mchp_coreqspi_of_match[] = {
-- 
2.53.0

[PATCH 6.6.y 2/2] spi: microchip-core-qspi: fix controller deregistration

[Sasha Levin]

From: Johan Hovold <johan@kernel.org>

[ Upstream commit e6464140d439f2d42f072eb422a5b1fec470c5a6 ]

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

Fixes: 8596124c4c1b ("spi: microchip-core-qspi: Add support for microchip fpga qspi controllers")
Cc: stable@vger.kernel.org	# 6.1
Cc: Naga Sureshkumar Relli <nagasuresh.relli@microchip.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260409120419.388546-19-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/spi/spi-microchip-core-qspi.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-microchip-core-qspi.c b/drivers/spi/spi-microchip-core-qspi.c
index 0e44683d5ab5e..160861891b460 100644
--- a/drivers/spi/spi-microchip-core-qspi.c
+++ b/drivers/spi/spi-microchip-core-qspi.c
@@ -512,7 +512,7 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 				     "unable to allocate master for QSPI controller\n");
 
 	qspi = spi_controller_get_devdata(ctlr);
-	platform_set_drvdata(pdev, qspi);
+	platform_set_drvdata(pdev, ctlr);
 
 	qspi->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(qspi->regs))
@@ -545,7 +545,7 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 			  SPI_TX_DUAL | SPI_TX_QUAD;
 	ctlr->dev.of_node = np;
 
-	ret = devm_spi_register_controller(&pdev->dev, ctlr);
+	ret = spi_register_controller(ctlr);
 	if (ret)
 		return dev_err_probe(&pdev->dev, ret,
 				     "spi_register_controller failed\n");
@@ -555,9 +555,13 @@ static int mchp_coreqspi_probe(struct platform_device *pdev)
 
 static void mchp_coreqspi_remove(struct platform_device *pdev)
 {
-	struct mchp_coreqspi *qspi = platform_get_drvdata(pdev);
-	u32 control = readl_relaxed(qspi->regs + REG_CONTROL);
+	struct spi_controller *ctlr = platform_get_drvdata(pdev);
+	struct mchp_coreqspi *qspi = spi_controller_get_devdata(ctlr);
+	u32 control;
 
+	spi_unregister_controller(ctlr);
+
+	control = readl_relaxed(qspi->regs + REG_CONTROL);
 	mchp_coreqspi_disable_ints(qspi);
 	control &= ~CONTROL_ENABLE;
 	writel_relaxed(control, qspi->regs + REG_CONTROL);
-- 
2.53.0