This is a note to let you know that I've just added the patch titled
x86/ioapic: Restore IO-APIC irq_chip retrigger callback
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-ioapic-restore-io-apic-irq_chip-retrigger-callback.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a9b4f08770b415f30f2fb0f8329a370c8f554aa3 Mon Sep 17 00:00:00 2001
From: Ruslan Ruslichenko <rruslich@xxxxxxxxx>
Date: Tue, 17 Jan 2017 16:13:52 +0200
Subject: x86/ioapic: Restore IO-APIC irq_chip retrigger callback
From: Ruslan Ruslichenko <rruslich@xxxxxxxxx>
commit a9b4f08770b415f30f2fb0f8329a370c8f554aa3 upstream.
commit d32932d02e18 removed the irq_retrigger callback from the IO-APIC
chip and did not add it to the new IO-APIC-IR irq chip.
There is no harm because the interrupts are resent in software when the
retrigger callback is NULL, but it's less efficient. So restore them.
[ tglx: Massaged changelog ]
Fixes: d32932d02e18 ("x86/irq: Convert IOAPIC to use hierarchical irqdomain interfaces")
Signed-off-by: Ruslan Ruslichenko <rruslich@xxxxxxxxx>
Cc: xe-linux-external@xxxxxxxxx
Link: http://lkml.kernel.org/r/1484662432-13580-1-git-send-email-rruslich@xxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/apic/io_apic.c | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1875,6 +1875,7 @@ static struct irq_chip ioapic_chip __rea
.irq_ack = irq_chip_ack_parent,
.irq_eoi = ioapic_ack_level,
.irq_set_affinity = ioapic_set_affinity,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
.flags = IRQCHIP_SKIP_SET_WAKE,
};
@@ -1886,6 +1887,7 @@ static struct irq_chip ioapic_ir_chip __
.irq_ack = irq_chip_ack_parent,
.irq_eoi = ioapic_ir_ack_level,
.irq_set_affinity = ioapic_set_affinity,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
.flags = IRQCHIP_SKIP_SET_WAKE,
};
Patches currently in stable-queue which might be from rruslich@xxxxxxxxx are
queue-4.4/x86-ioapic-restore-io-apic-irq_chip-retrigger-callback.patch