Re: [PATCH v2] iio: adc: stm32-adc: Fix race in installing chained IRQ handler
From: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Date: 2025-05-26 15:52:09
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linux-iio, lkml
On 5/25/25 13:07, Jonathan Cameron wrote:
On Thu, 15 May 2025 11:26:56 +0100 Nuno Sá [off-list ref] wrote:quoted
On Thu, 2025-05-15 at 16:31 +0800, Chen Ni wrote:quoted
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: d58c67d1d851 ("iio: adc: stm32-adc: add support for STM32MP1") Signed-off-by: Chen Ni <redacted> ---Reviewed-by: Nuno Sá <nuno.sa@analog.com>Looks good to me and I've queued it up for after rc1. If any ST folk have time to take a look that would be great.
Hi Jonathan,
One minor comment at my end, not sure if that changes a lot...
This could be a fix for the older commit:
1add69880240 ("iio: adc: Add support for STM32 ADC core")
Apart from that, you can add my:
Tested-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
BR,
Fabrice
Jonathanquoted
quoted
Changelog: v1 -> v2: 1. Add Fixes tag. --- drivers/iio/adc/stm32-adc-core.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c index bd3458965bff..21c04a98b3b6 100644--- a/drivers/iio/adc/stm32-adc-core.c +++ b/drivers/iio/adc/stm32-adc-core.c@@ -430,10 +430,9 @@ 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; }