From 2ef1cb763d92f3e212005fcf5dcc713eaf42b257 Mon Sep 17 00:00:00 2001 From: afzal mohammed Date: Wed, 4 Mar 2020 06:18:38 +0530 Subject: irqchip: Replace setup_irq() by request_irq() request_irq() is preferred over setup_irq(). Invocations of setup_irq() occur after memory allocators are ready. Per tglx[1], setup_irq() existed in olden days when allocators were not ready by the time early interrupts were initialized. Hence replace setup_irq() by request_irq(). [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos Signed-off-by: afzal mohammed Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20200304004839.4729-1-afzal.mohd.ma@gmail.com --- drivers/irqchip/irq-i8259.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) (limited to 'drivers/irqchip/irq-i8259.c') diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c index d000870d9b6b..b6f6aa7b2862 100644 --- a/drivers/irqchip/irq-i8259.c +++ b/drivers/irqchip/irq-i8259.c @@ -268,15 +268,6 @@ static void init_8259A(int auto_eoi) raw_spin_unlock_irqrestore(&i8259A_lock, flags); } -/* - * IRQ2 is cascade interrupt to second interrupt controller - */ -static struct irqaction irq2 = { - .handler = no_action, - .name = "cascade", - .flags = IRQF_NO_THREAD, -}; - static struct resource pic1_io_resource = { .name = "pic1", .start = PIC_MASTER_CMD, @@ -311,6 +302,10 @@ static const struct irq_domain_ops i8259A_ops = { */ struct irq_domain * __init __init_i8259_irqs(struct device_node *node) { + /* + * PIC_CASCADE_IR is cascade interrupt to second interrupt controller + */ + int irq = I8259A_IRQ_BASE + PIC_CASCADE_IR; struct irq_domain *domain; insert_resource(&ioport_resource, &pic1_io_resource); @@ -323,7 +318,8 @@ struct irq_domain * __init __init_i8259_irqs(struct device_node *node) if (!domain) panic("Failed to add i8259 IRQ domain"); - setup_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, &irq2); + if (request_irq(irq, no_action, IRQF_NO_THREAD, "cascade", NULL)) + pr_err("Failed to register cascade interrupt\n"); register_syscore_ops(&i8259_syscore_ops); return domain; } -- cgit v1.2.3