From 9b84ad676e248a3e3c81db7f5d39e1739b3780aa Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Sat, 15 Jun 2019 16:35:26 +0200 Subject: [PATCH] powerpc/4xx/uic: clear pending interrupt after irq type/pol change When testing out gpio-keys with a button, a spurious interrupt (and therefore a key press or release event) gets triggered as soon as the driver enables the irq line for the first time. This patch clears any potential bogus generated interrupt that was caused by the switching of the associated irq's type and polarity. Signed-off-by: Christian Lamparter --- arch/powerpc/platforms/4xx/uic.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/powerpc/platforms/4xx/uic.c +++ b/arch/powerpc/platforms/4xx/uic.c @@ -158,6 +158,7 @@ static int uic_set_irq_type(struct irq_d mtdcr(uic->dcrbase + UIC_PR, pr); mtdcr(uic->dcrbase + UIC_TR, tr); + mtdcr(uic->dcrbase + UIC_SR, ~mask); raw_spin_unlock_irqrestore(&uic->lock, flags);