linux-kernel - [PATCH] mailbox: apple: Keep IRQs active in suspend

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Date:   Mon,  2 May 2022 17:33:45 +0900
From:   Hector Martin <marcan@...can.st>
To:     Jassi Brar <jassisinghbrar@...il.com>
Cc:     Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Sven Peter <sven@...npeter.dev>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Hector Martin <marcan@...can.st>
Subject: [PATCH] mailbox: apple: Keep IRQs active in suspend

Some consumers (notably SMC) need to be wakeup sources for s2idle,
so the IRQs need to stay enabled during suspend. We expect
consumers to properly suspend coprocessors such that no IRQs would
be triggered where not necessary, so this can be done unconditionally.

Signed-off-by: Hector Martin <marcan@...can.st>
---
 drivers/mailbox/apple-mailbox.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/mailbox/apple-mailbox.c b/drivers/mailbox/apple-mailbox.c
index e0c2bf7c6338..ce54f72d8676 100644
--- a/drivers/mailbox/apple-mailbox.c
+++ b/drivers/mailbox/apple-mailbox.c
@@ -369,8 +369,8 @@ static int apple_mbox_probe(struct platform_device *pdev)
 
 	ret = devm_request_threaded_irq(dev, mbox->irq_recv_not_empty, NULL,
 					apple_mbox_recv_irq,
-					IRQF_NO_AUTOEN | IRQF_ONESHOT, irqname,
-					mbox);
+					IRQF_NO_AUTOEN | IRQF_ONESHOT | IRQF_NO_SUSPEND,
+					irqname, mbox);
 	if (ret)
 		return ret;
 
@@ -378,9 +378,8 @@ static int apple_mbox_probe(struct platform_device *pdev)
 	if (!irqname)
 		return -ENOMEM;
 
-	ret = devm_request_irq(dev, mbox->irq_send_empty,
-			       apple_mbox_send_empty_irq, IRQF_NO_AUTOEN,
-			       irqname, mbox);
+	ret = devm_request_irq(dev, mbox->irq_send_empty, apple_mbox_send_empty_irq,
+			       IRQF_NO_AUTOEN | IRQF_NO_SUSPEND, irqname, mbox);
 	if (ret)
 		return ret;
 
-- 
2.35.1