tree 86085b052925f35662db02571c167e6002200703
parent 20756b70965b14956b4167320a3796dc9a45f341
author Christian Lamparter <chunkeey@gmail.com> 1560612193 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1564904019 +0200

powerpc/4xx/uic: clear pending interrupt after irq type/pol change

[ Upstream commit 3ab3a0689e74e6aa5b41360bc18861040ddef5b1 ]

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 <chunkeey@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>