spi: fsl: fix controller deregistration

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

---

Changes in v2:
- add missing deregistration in of_fsl_spi_remove()

 drivers/spi/spi-fsl-spi.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

index bf3fc3ce0cc2..1252c41c206f 100644
@@ -614,7 +614,7 @@ static struct spi_controller *fsl_spi_probe(struct device *dev,
 
 	mpc8xxx_spi_write_reg(&reg_base->mode, regval);
 
-	ret = devm_spi_register_controller(dev, host);
+	ret = spi_register_controller(host);
 	if (ret < 0)
 		goto err_probe;
 

@@ -705,7 +705,13 @@ static void of_fsl_spi_remove(struct platform_device *ofdev)
 	struct spi_controller *host = platform_get_drvdata(ofdev);
 	struct mpc8xxx_spi *mpc8xxx_spi = spi_controller_get_devdata(host);
 
+	spi_controller_get(host);
+
+	spi_unregister_controller(host);
+
 	fsl_spi_cpm_free(mpc8xxx_spi);
+
+	spi_controller_put(host);
 }
 
 static struct platform_driver of_fsl_spi_driver = {

@@ -751,7 +757,13 @@ static void plat_mpc8xxx_spi_remove(struct platform_device *pdev)
 	struct spi_controller *host = platform_get_drvdata(pdev);
 	struct mpc8xxx_spi *mpc8xxx_spi = spi_controller_get_devdata(host);
 
+	spi_controller_get(host);
+
+	spi_unregister_controller(host);
+
 	fsl_spi_cpm_free(mpc8xxx_spi);
+
+	spi_controller_put(host);
 }
 
 MODULE_ALIAS("platform:mpc8xxx_spi");

2.52.0

Applied to

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-7.1

Thanks!

[1/1] spi: fsl: fix controller deregistration

      https://git.kernel.org/broonie/spi/c/9b7abfed4c37

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

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Thanks,
Mark