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Subject[PATCH 2/2] mfd: fsl-imx25: clean up irq settings during removal
Date
When fsl-imx25-tsadc is compiled as a module, unloading and reloading
the module will lead to a crash.

Add a removal function which clears the irq handler and removes the irq
domain. With this cleanup in place, it's possible to unload and reload
the module.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
drivers/mfd/fsl-imx25-tsadc.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/drivers/mfd/fsl-imx25-tsadc.c b/drivers/mfd/fsl-imx25-tsadc.c
index 14189ef..a6423bd 100644
--- a/drivers/mfd/fsl-imx25-tsadc.c
+++ b/drivers/mfd/fsl-imx25-tsadc.c
@@ -179,6 +179,19 @@ static int mx25_tsadc_probe(struct platform_device *pdev)
return devm_of_platform_populate(dev);
}

+static int __exit mx25_tsadc_remove(struct platform_device *pdev)
+{
+ struct mx25_tsadc *tsadc = platform_get_drvdata(pdev);
+ int irq = platform_get_irq(pdev, 0);
+
+ if (irq) {
+ irq_set_chained_handler_and_data(irq, NULL, NULL);
+ irq_domain_remove(tsadc->domain);
+ }
+
+ return 0;
+}
+
static const struct of_device_id mx25_tsadc_ids[] = {
{ .compatible = "fsl,imx25-tsadc" },
{ /* Sentinel */ }
@@ -191,6 +204,7 @@ static struct platform_driver mx25_tsadc_driver = {
.of_match_table = of_match_ptr(mx25_tsadc_ids),
},
.probe = mx25_tsadc_probe,
+ .remove = __exit_p(mx25_tsadc_remove),
};
module_platform_driver(mx25_tsadc_driver);

--
2.1.4
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