[PATCH 10/20] spi: coldfire-qspi: fix controller deregistration

Johan Hovold
2026-04-09T12:05:26Z

Make sure to deregister the controller before disabling underlying
resources like clocks (via runtime pm) during driver unbind.

Fixes: 34b8c6617366 ("spi: Add Freescale/Motorola Coldfire QSPI driver")
Cc: stable@vger.kernel.org # 2.6.34
Cc: Steven King <sfking@fdwdc.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/spi/spi-coldfire-qspi.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-coldfire-qspi.c b/drivers/spi/spi-coldfire-qspi.c
index fdf37636cb9f..b45f44de85dc 100644
--- a/drivers/spi/spi-coldfire-qspi.c
+++ b/drivers/spi/spi-coldfire-qspi.c
@@ -410,9 +410,9 @@ static int mcfqspi_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, host);
pm_runtime_enable(&pdev->dev);

- status = devm_spi_register_controller(&pdev->dev, host);
+ status = spi_register_controller(host);
if (status) {
- dev_dbg(&pdev->dev, "devm_spi_register_controller failed\n");
+ dev_dbg(&pdev->dev, "failed to register controller\n");
goto fail1;
}

@@ -436,11 +436,17 @@ static void mcfqspi_remove(struct platform_device *pdev)
struct spi_controller *host = platform_get_drvdata(pdev);
struct mcfqspi *mcfqspi = spi_controller_get_devdata(host);

+ spi_controller_get(host);
+
+ spi_unregister_controller(host);
+
pm_runtime_disable(&pdev->dev);
/* disable the hardware (set the baud rate to 0) */
mcfqspi_wr_qmr(mcfqspi, MCFQSPI_QMR_MSTR);

mcfqspi_cs_teardown(mcfqspi);
+
+ spi_controller_put(host);
}

#ifdef CONFIG_PM_SLEEP
--
2.52.0