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| author |   Marc Zyngier <maz@kernel.org> | 2021-05-12 16:18:15 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-06-10 13:09:19 +0100 |
| commit | e1c054918c6c7a30a35d2c183ed86600a071cdab (patch) | |
| tree | ce1e0dc266b9229bae2169ff767f4126fd02e4ac /kernel/irq | |
| parent | genirq: Add generic_handle_domain_irq() helper (diff) | |
| download | linux-dev-e1c054918c6c7a30a35d2c183ed86600a071cdab.tar.xz linux-dev-e1c054918c6c7a30a35d2c183ed86600a071cdab.zip | |
genirq: Move non-irqdomain handle_domain_irq() handling into ARM's handle_IRQ()
Despite the name, handle_domain_irq() deals with non-irqdomain
handling for the sake of a handful of legacy ARM platforms.
Move such handling into ARM's handle_IRQ(), allowing for better
code generation for everyone else. This allows us get rid of
some complexity, and to rearrange the guards on the various helpers
in a more logical way.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/irqdesc.c | 30 |
1 files changed, 8 insertions, 22 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 6179d5bde88e..f4dd5186858a 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -659,7 +659,7 @@ int generic_handle_irq(unsigned int irq) } EXPORT_SYMBOL_GPL(generic_handle_irq); -#ifdef CONFIG_HANDLE_DOMAIN_IRQ +#ifdef CONFIG_IRQ_DOMAIN /** * generic_handle_domain_irq - Invoke the handler for a HW irq belonging * to a domain, usually for a non-root interrupt @@ -676,9 +676,10 @@ int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwirq) } EXPORT_SYMBOL_GPL(generic_handle_domain_irq); +#ifdef CONFIG_HANDLE_DOMAIN_IRQ /** - * __handle_domain_irq - Invoke the handler for a HW irq belonging to a domain, - * usually for a root interrupt controller + * handle_domain_irq - Invoke the handler for a HW irq belonging to a domain, + * usually for a root interrupt controller * @domain: The domain where to perform the lookup * @hwirq: The HW irq number to convert to a logical one * @lookup: Whether to perform the domain lookup or not @@ -686,8 +687,8 @@ EXPORT_SYMBOL_GPL(generic_handle_domain_irq); * * Returns: 0 on success, or -EINVAL if conversion has failed */ -int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, - bool lookup, struct pt_regs *regs) +int handle_domain_irq(struct irq_domain *domain, + unsigned int hwirq, struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); struct irq_desc *desc; @@ -695,22 +696,8 @@ int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, irq_enter(); - if (likely(IS_ENABLED(CONFIG_IRQ_DOMAIN) && lookup)) { - /* The irqdomain code provides boundary checks */ - desc = irq_resolve_mapping(domain, hwirq); - } else { - /* - * Some hardware gives randomly wrong interrupts. Rather - * than crashing, do something sensible. - */ - if (unlikely(!hwirq || hwirq >= nr_irqs)) { - ack_bad_irq(hwirq); - desc = NULL; - } else { - desc = irq_to_desc(hwirq); - } - } - + /* The irqdomain code provides boundary checks */ + desc = irq_resolve_mapping(domain, hwirq); if (likely(desc)) handle_irq_desc(desc); else @@ -721,7 +708,6 @@ int __handle_domain_irq(struct irq_domain *domain, unsigned int hwirq, return ret; } -#ifdef CONFIG_IRQ_DOMAIN /** * handle_domain_nmi - Invoke the handler for a HW irq belonging to a domain * @domain: The domain where to perform the lookup |