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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 /arch/arm/kernel/irq.c | |
| 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 '')
| -rw-r--r-- | arch/arm/kernel/irq.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 698b6f636156..20ab1e607522 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -63,7 +63,27 @@ int arch_show_interrupts(struct seq_file *p, int prec) */ void handle_IRQ(unsigned int irq, struct pt_regs *regs) { - __handle_domain_irq(NULL, irq, false, regs); + struct pt_regs *old_regs = set_irq_regs(regs); + struct irq_desc *desc; + + irq_enter(); + + /* + * Some hardware gives randomly wrong interrupts. Rather + * than crashing, do something sensible. + */ + if (unlikely(!irq || irq >= nr_irqs)) + desc = NULL; + else + desc = irq_to_desc(irq); + + if (likely(desc)) + handle_irq_desc(desc); + else + ack_bad_irq(irq); + + irq_exit(); + set_irq_regs(old_regs); } /* |