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iio: adc: stm32-adc: Fix race in installing chained IRQ handler

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commit e8ad595064f6ebd5d2d1a5d5d7ebe0efce623091 upstream.

Fix a race where a pending interrupt could be received and the handler
called before the handler's data has been setup, by converting to
irq_set_chained_handler_and_data().

Fixes: 1add698802 ("iio: adc: Add support for STM32 ADC core")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Tested-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://patch.msgid.link/20250515083101.3811350-1-nichen@iscas.ac.cn
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chen Ni 2025-05-15 16:31:01 +08:00 • committed by Greg Kroah-Hartman
commit fedfd16c29
1 changed files with 3 additions and 4 deletions
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7
drivers/iio/adc/stm32-adc-core.c
View file

@ -393,10 +393,9 @@ static int stm32_adc_irq_probe(struct platform_device *pdev,
return -ENOMEM;
}
for (i = 0; i < priv->cfg->num_irqs; i++) {
irq_set_chained_handler(priv->irq[i], stm32_adc_irq_handler);
irq_set_handler_data(priv->irq[i], priv);
}
for (i = 0; i < priv->cfg->num_irqs; i++)
irq_set_chained_handler_and_data(priv->irq[i],
stm32_adc_irq_handler, priv);
return 0;
}