Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=cc75b92d11384ba14f93828a2a0040344ae872e7
Commit: cc75b92d11384ba14f93828a2a0040344ae872e7
Parent: 2464286ace55b3abddfb9cc30ab95e2dac1de9a6
Author: Thomas Gleixner <[EMAIL PROTECTED]>
AuthorDate: Sun Aug 12 15:46:36 2007 +0000
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Sun Aug 12 11:05:45 2007 -0700
genirq: mark io_apic level interrupts to avoid resend
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 <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/i386/kernel/io_apic.c | 7 +++++--
arch/x86_64/kernel/io_apic.c | 7 +++++--
2 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
index 893df82..4b8a8da 100644
--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -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]);
}
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 050141c..f57f8b9 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -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,
-
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