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genirq: mark io_apic level interrupts to avoid resend

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Level type interrupts do not need to be resent.  It was also found that
some chipsets get confused in case of the resend.

Mark the ioapic level type interrupts as such to avoid the resend
functionality in the generic irq code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Thomas Gleixner 2007-08-12 15:46:36 +00:00 committed by Linus Torvalds
parent 2464286ace
commit cc75b92d11
2 changed files with 10 additions and 4 deletions
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7
arch/i386/kernel/io_apic.c
View file

@ -1256,12 +1256,15 @@ static struct irq_chip ioapic_chip;
static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
{
if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
trigger == IOAPIC_LEVEL)
trigger == IOAPIC_LEVEL) {
irq_desc[irq].status |= IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_fasteoi_irq, "fasteoi");
else
} else {
irq_desc[irq].status &= ~IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_edge_irq, "edge");
}
set_intr_gate(vector, interrupt[irq]);
}

7
arch/x86_64/kernel/io_apic.c
View file

@ -800,12 +800,15 @@ static struct irq_chip ioapic_chip;
static void ioapic_register_intr(int irq, unsigned long trigger)
{
if (trigger)
if (trigger) {
irq_desc[irq].status |= IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_fasteoi_irq, "fasteoi");
else
} else {
irq_desc[irq].status &= ~IRQ_LEVEL;
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_edge_irq, "edge");
}
}
static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq,