Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
authored by
Thomas Gleixner
and committed by
Linus Torvalds
cc75b92d
2464286a
+10
-4
+5
-2
arch/i386/kernel/io_apic.c
+5
-2
arch/i386/kernel/io_apic.c
···
1256
1256
static void ioapic_register_intr(int irq, int vector, unsigned long trigger)
1257
1257
{
1258
1258
if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
1259
-
trigger == IOAPIC_LEVEL)
1259
+
trigger == IOAPIC_LEVEL) {
1260
+
irq_desc[irq].status |= IRQ_LEVEL;
1260
1261
set_irq_chip_and_handler_name(irq, &ioapic_chip,
1261
1262
handle_fasteoi_irq, "fasteoi");
1262
-
else
1263
+
} else {
1264
+
irq_desc[irq].status &= ~IRQ_LEVEL;
1263
1265
set_irq_chip_and_handler_name(irq, &ioapic_chip,
1264
1266
handle_edge_irq, "edge");
1267
+
}
1265
1268
set_intr_gate(vector, interrupt[irq]);
1266
1269
}
1267
1270
+5
-2
arch/x86_64/kernel/io_apic.c
+5
-2
arch/x86_64/kernel/io_apic.c
···
800
800
801
801
static void ioapic_register_intr(int irq, unsigned long trigger)
802
802
{
803
-
if (trigger)
803
+
if (trigger) {
804
+
irq_desc[irq].status |= IRQ_LEVEL;
804
805
set_irq_chip_and_handler_name(irq, &ioapic_chip,
805
806
handle_fasteoi_irq, "fasteoi");
806
-
else
807
+
} else {
808
+
irq_desc[irq].status &= ~IRQ_LEVEL;
807
809
set_irq_chip_and_handler_name(irq, &ioapic_chip,
808
810
handle_edge_irq, "edge");
811
+
}
809
812
}
810
813
811
814
static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq,