diff options
| author | afzal mohammed <afzal.mohd.ma@gmail.com> | 2020-03-04 03:48:38 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-03-08 17:25:46 +0300 |
| commit | 2ef1cb763d92f3e212005fcf5dcc713eaf42b257 (patch) | |
| tree | 398a24a3ebdc14feced964b1180c66497249857f /drivers/irqchip/irq-i8259.c | |
| parent | bc714c8bd4b7f1f29f9b15d79211c5fb3aa63c4d (diff) | |
| download | linux-2ef1cb763d92f3e212005fcf5dcc713eaf42b257.tar.xz | |
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 <afzal.mohd.ma@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200304004839.4729-1-afzal.mohd.ma@gmail.com
Diffstat (limited to 'drivers/irqchip/irq-i8259.c')
| -rw-r--r-- | drivers/irqchip/irq-i8259.c | 16 |
1 files changed, 6 insertions, 10 deletions
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; } |