[PATCH] iio: proximity: vcnl3020: fix ISR bitmask check in IRQ handler

[Salah Triki <salah.triki@gmail.com>]

In vcnl3020_handle_irq_thread(), the status register (VCNL_ISR) was
incorrectly checked against VCNL_ICR_THRES_EN (BIT(1)), which is a bit
mask intended for the Interrupt Control Register (VCNL_PS_ICR).

Because BIT(1) in the ISR register corresponds only to VCNL_INT_TH_LOW,
any high-threshold interrupt (VCNL_INT_TH_HI, BIT(0)) occurring on its own
resulted in the handler returning IRQ_NONE and ignoring the event.

Fix this by checking the ISR value against both valid status bits:
VCNL_INT_TH_HI and VCNL_INT_TH_LOW.

Fixes: 3363fbbe19e5 ("iio: proximity: vcnl3020: add periodic mode")
Signed-off-by: Salah Triki <salah.triki@gmail.com>
---
 drivers/iio/proximity/vcnl3020.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/proximity/vcnl3020.c b/drivers/iio/proximity/vcnl3020.c
index 7f417372566a..d4ad06f8f366 100644
--- a/drivers/iio/proximity/vcnl3020.c
+++ b/drivers/iio/proximity/vcnl3020.c
@@ -584,7 +584,7 @@ static irqreturn_t vcnl3020_handle_irq_thread(int irq, void *p)
 		return IRQ_HANDLED;
 	}
 
-	if (!(isr & VCNL_ICR_THRES_EN))
+	if (!(isr & (VCNL_INT_TH_HI | VCNL_INT_TH_LOW)))
 		return IRQ_NONE;
 
 	iio_push_event(indio_dev,
-- 
2.43.0