Commit-ID: 518bfe84ec417318b2470652cdb27978ddfeaa59
Gitweb: https://git.kernel.org/tip/518bfe84ec417318b2470652cdb27978ddfeaa59
Author: Aaro Koskinen <aaro.koskinen@xxxxxx>
AuthorDate: Wed, 6 Feb 2019 23:26:08 +0200
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Thu, 14 Feb 2019 10:42:11 +0000
irqchip/i8259: Fix shutdown order by moving syscore_ops registration
When using cpufreq on Loongson 2F MIPS platform, "poweroff"
command gets frequently stuck in syscore_shutdown(). The reason is
that i8259A_shutdown() gets called before cpufreq_suspend(), and if we
have pending work then irq_work_sync() in cpufreq_dbs_governor_stop()
gets stuck forever as we have all interrupts masked already.
irq-i8259 is registering syscore_ops using device_initcall(),
while cpufreq uses core_initcall(). Fix the shutdown order simply
by registering the irq syscore_ops during the early IRQ init instead
of using a separate initcall at later stage.
Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-i8259.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c
index b0d4aab1a58c..d000870d9b6b 100644
--- a/drivers/irqchip/irq-i8259.c
+++ b/drivers/irqchip/irq-i8259.c
@@ -225,14 +225,6 @@ static struct syscore_ops i8259_syscore_ops = {
.shutdown = i8259A_shutdown,
};
-static int __init i8259A_init_sysfs(void)
-{
- register_syscore_ops(&i8259_syscore_ops);
- return 0;
-}
-
-device_initcall(i8259A_init_sysfs);
-
static void init_8259A(int auto_eoi)
{
unsigned long flags;
@@ -332,6 +324,7 @@ struct irq_domain * __init __init_i8259_irqs(struct device_node *node)
panic("Failed to add i8259 IRQ domain");
setup_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, &irq2);
+ register_syscore_ops(&i8259_syscore_ops);
return domain;
}
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