linux-kernel - [PATCH] mailbox: qcom-ipcc: Use generic_handle_irq

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Date:   Fri,  9 Sep 2022 12:20:43 -0400
From:   Eric Chanudet <echanude@...hat.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Jassi Brar <jassisinghbrar@...il.com>
Cc:     linux-arm-msm@...r.kernel.org, linux-rt-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, Eric Chanudet <echanude@...hat.com>
Subject: [PATCH] mailbox: qcom-ipcc: Use generic_handle_irq_safe()

PREEMPT_RT forces qcom-ipcc's handler to be threaded with interrupts
enabled, which triggers a warning in __handle_irq_event_percpu().

Use generic_handle_irq_safe() that can be called with or without
interrupts enabled instead.

Signed-off-by: Eric Chanudet <echanude@...hat.com>
---
 drivers/mailbox/qcom-ipcc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mailbox/qcom-ipcc.c b/drivers/mailbox/qcom-ipcc.c
index 31d58b7d55fe..be803f324a33 100644
--- a/drivers/mailbox/qcom-ipcc.c
+++ b/drivers/mailbox/qcom-ipcc.c
@@ -82,7 +82,7 @@ static irqreturn_t qcom_ipcc_irq_fn(int irq, void *data)
 
 		virq = irq_find_mapping(ipcc->irq_domain, hwirq);
 		writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_CLEAR);
-		generic_handle_irq(virq);
+		generic_handle_irq_safe(virq);
 	}
 
 	return IRQ_HANDLED;
-- 
2.37.3