[PATCH 6.18 311/752] mailbox: pcc: Remove spurious IRQF_ONESHOT usage

Sasha Levin
2026-02-28T17:52:29Z

From: Mark Brown <broonie@kernel.org>

[ Upstream commit 673327028cd61db68a1e0c708be2e302c082adf9 ]

The PCC code currently specifies IRQF_ONESHOT if the interrupt could
potentially be shared but doesn't actually use request_threaded_irq() and
the interrupt handler does not use IRQ_WAKE_THREAD so IRQF_ONESHOT is
never relevant. Since commit aef30c8d569c ("genirq: Warn about using
IRQF_ONESHOT without a threaded handler") specifying it has resulted in a
WARN_ON(), fix this by removing IRQF_ONESHOT.

Reported-by: Aishwarya TCV <Aishwarya.TCV@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mailbox/pcc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 0e0a66359d4c3..713022aed2e2f 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -459,7 +459,7 @@ static int pcc_startup(struct mbox_chan *chan)

if (pchan->plat_irq > 0) {
irqflags = pcc_chan_plat_irq_can_be_shared(pchan) ?
- IRQF_SHARED | IRQF_ONESHOT : 0;
+ IRQF_SHARED : 0;
rc = devm_request_irq(chan->mbox->dev, pchan->plat_irq, pcc_mbox_irq,
irqflags, MBOX_IRQ_NAME, chan);
if (unlikely(rc)) {
--
2.51.0