1 From c93b0344d24ba63e0e4caeb693a9fcb7320aae3a Mon Sep 17 00:00:00 2001
2 From: Giedrius <giedrius@blokas.io>
3 Date: Wed, 27 Feb 2019 14:27:28 +0000
4 Subject: [PATCH] Fix for Pisound kernel module in Real Time kernel
7 When handler of data_available interrupt is fired, queue_work ends up
8 getting called and it can block on a spin lock which is not allowed in
9 interrupt context. The fix was to run the handler from a thread context
12 sound/soc/bcm/pisound.c | 8 ++++----
13 1 file changed, 4 insertions(+), 4 deletions(-)
15 --- a/sound/soc/bcm/pisound.c
16 +++ b/sound/soc/bcm/pisound.c
19 * Pisound Linux kernel module.
20 - * Copyright (C) 2016-2017 Vilniaus Blokas UAB, https://blokas.io/pisound
21 + * Copyright (C) 2016-2019 Vilniaus Blokas UAB, https://blokas.io/pisound
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License
25 @@ -532,10 +532,10 @@ static void pisnd_spi_gpio_uninit(void)
27 static int pisnd_spi_gpio_irq_init(struct device *dev)
30 - gpiod_to_irq(data_available),
31 + return request_threaded_irq(
32 + gpiod_to_irq(data_available), NULL,
33 data_available_interrupt_handler,
34 - IRQF_TIMER | IRQF_TRIGGER_RISING,
35 + IRQF_TIMER | IRQF_TRIGGER_RISING | IRQF_ONESHOT,