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irqchip/xtensa-mx: Fix initial IRQ affinity in non-SMP setup 

When irq-xtensa-mx chip is used in non-SMP configuration its
irq_set_affinity callback is not called leaving IRQ affinity set empty.
As a result IRQ delivery does not work in that configuration.
Initialize IRQ affinity of the xtensa MX interrupt distributor to CPU 0
for all external IRQ lines.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220426161912.1113784-1-jcmvbkbc@gmail.com
This commit is contained in:
Max Filippov 2022-04-26 09:19:12 -07:00 committed by Marc Zyngier
parent 4efc851c36
commit 168f633b17
1 changed files with 14 additions and 4 deletions
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18
drivers/irqchip/irq-xtensa-mx.c
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@ -151,14 +151,25 @@ static struct irq_chip xtensa_mx_irq_chip = {
.irq_set_affinity = xtensa_mx_irq_set_affinity, .irq_set_affinity = xtensa_mx_irq_set_affinity,
}; };
static void __init xtensa_mx_init_common(struct irq_domain *root_domain)
{
unsigned int i;
irq_set_default_host(root_domain);
secondary_init_irq();
/* Initialize default IRQ routing to CPU 0 */
for (i = 0; i < XCHAL_NUM_EXTINTERRUPTS; ++i)
set_er(1, MIROUT(i));
}
int __init xtensa_mx_init_legacy(struct device_node *interrupt_parent) int __init xtensa_mx_init_legacy(struct device_node *interrupt_parent)
{ {
struct irq_domain *root_domain = struct irq_domain *root_domain =
irq_domain_add_legacy(NULL, NR_IRQS - 1, 1, 0, irq_domain_add_legacy(NULL, NR_IRQS - 1, 1, 0,
&xtensa_mx_irq_domain_ops, &xtensa_mx_irq_domain_ops,
&xtensa_mx_irq_chip); &xtensa_mx_irq_chip);
irq_set_default_host(root_domain); xtensa_mx_init_common(root_domain);
secondary_init_irq();
return 0; return 0;
} }
@ -168,8 +179,7 @@ static int __init xtensa_mx_init(struct device_node *np,
struct irq_domain *root_domain = struct irq_domain *root_domain =
irq_domain_add_linear(np, NR_IRQS, &xtensa_mx_irq_domain_ops, irq_domain_add_linear(np, NR_IRQS, &xtensa_mx_irq_domain_ops,
&xtensa_mx_irq_chip); &xtensa_mx_irq_chip);
irq_set_default_host(root_domain); xtensa_mx_init_common(root_domain);
secondary_init_irq();
return 0; return 0;
} }
IRQCHIP_DECLARE(xtensa_mx_irq_chip, "cdns,xtensa-mx", xtensa_mx_init); IRQCHIP_DECLARE(xtensa_mx_irq_chip, "cdns,xtensa-mx", xtensa_mx_init);