[PATCH v2] iio: adc: stm32-adc: Fix race in installing chained IRQ handler

[Chen Ni]

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 <nichen at iscas.ac.cn>
---
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;
 }
-- 
2.25.1