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Subject[PATCH] Fix IRQ issue by setting IRQ_DISABLE_UNLAZY flag
Date
ADC using ad7793.ko, such as AD7794, may read incorrect data.
Extra interrupt is pending if the data on DOUT contains a falling edge.
Therefore, wait_for_completion_timeout returns immediately.
This patch fixes the issue by setting IRQ_DISABLE_UNLAZY flag.

Signed-off-by: Masahiro Honda <honda@mechatrax.com>
---
drivers/iio/adc/ad_sigma_delta.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index d8570f620..364051809 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -584,6 +584,7 @@ static int devm_ad_sd_probe_trigger(struct device *dev, struct iio_dev *indio_de
init_completion(&sigma_delta->completion);

sigma_delta->irq_dis = true;
+ irq_set_status_flags(sigma_delta->spi->irq, IRQ_DISABLE_UNLAZY);
ret = devm_request_irq(dev, sigma_delta->spi->irq,
ad_sd_data_rdy_trig_poll,
sigma_delta->info->irq_flags | IRQF_NO_AUTOEN,
--
2.34.1
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