Commit 3ab3a068 authored by Christian Lamparter's avatar Christian Lamparter Committed by Michael Ellerman

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: default avatarChristian Lamparter <chunkeey@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 7b570361
...@@ -158,6 +158,7 @@ static int uic_set_irq_type(struct irq_data *d, unsigned int flow_type) ...@@ -158,6 +158,7 @@ static int uic_set_irq_type(struct irq_data *d, unsigned int flow_type)
mtdcr(uic->dcrbase + UIC_PR, pr); mtdcr(uic->dcrbase + UIC_PR, pr);
mtdcr(uic->dcrbase + UIC_TR, tr); mtdcr(uic->dcrbase + UIC_TR, tr);
mtdcr(uic->dcrbase + UIC_SR, ~mask);
raw_spin_unlock_irqrestore(&uic->lock, flags); raw_spin_unlock_irqrestore(&uic->lock, flags);
......
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