This is a note to let you know that I've just added the patch titled

x86/acpi: Reduce code duplication in mp_override_legacy_irq()

to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: x86-acpi-reduce-code-duplication-in-mp_override_legacy_irq.patch and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 4ee2ec1b122599f7b10c849fa7915cebb37b7edb Mon Sep 17 00:00:00 2001

From: Vikas C Sajjan vikas.cha.sajjan@hpe.com Date: Thu, 16 Nov 2017 21:43:45 +0530 Subject: x86/acpi: Reduce code duplication in mp_override_legacy_irq()

From: Vikas C Sajjan vikas.cha.sajjan@hpe.com

commit 4ee2ec1b122599f7b10c849fa7915cebb37b7edb upstream.

The new function mp_register_ioapic_irq() is a subset of the code in mp_override_legacy_irq().

Replace the code duplication by invoking mp_register_ioapic_irq() from mp_override_legacy_irq().

Signed-off-by: Vikas C Sajjan vikas.cha.sajjan@hpe.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Reviewed-by: Thomas Gleixner tglx@linutronix.de Acked-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Cc: linux-pm@vger.kernel.org Cc: kkamagui@gmail.com Cc: linux-acpi@vger.kernel.org Link: https://lkml.kernel.org/r/1510848825-21965-3-git-send-email-vikas.cha.sajjan... Cc: Jean Delvare jdelvare@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/x86/kernel/acpi/boot.c | 27 +++++---------------------- 1 file changed, 5 insertions(+), 22 deletions(-)

--- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -308,13 +308,12 @@ acpi_parse_lapic_nmi(struct acpi_subtabl #ifdef CONFIG_X86_IO_APIC #define MP_ISA_BUS 0

+static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, + u8 trigger, u32 gsi); + static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) { - int ioapic; - int pin; - struct mpc_intsrc mp_irq; - /* * Check bus_irq boundary. */ @@ -324,14 +323,6 @@ static void __init mp_override_legacy_ir }

/* - * Convert 'gsi' to 'ioapic.pin'. - */ - ioapic = mp_find_ioapic(gsi); - if (ioapic < 0) - return; - pin = mp_find_ioapic_pin(ioapic, gsi); - - /* * TBD: This check is for faulty timer entries, where the override * erroneously sets the trigger to level, resulting in a HUGE * increase of timer interrupts! @@ -339,16 +330,8 @@ static void __init mp_override_legacy_ir if ((bus_irq == 0) && (trigger == 3)) trigger = 1;

- mp_irq.type = MP_INTSRC; - mp_irq.irqtype = mp_INT; - mp_irq.irqflag = (trigger << 2) | polarity; - mp_irq.srcbus = MP_ISA_BUS; - mp_irq.srcbusirq = bus_irq; /* IRQ */ - mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ - mp_irq.dstirq = pin; /* INTIN# */ - - mp_save_irq(&mp_irq); - + if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) + return; /* * Reset default identity mapping if gsi is also an legacy IRQ, * otherwise there will be more than one entry with the same GSI

Patches currently in stable-queue which might be from vikas.cha.sajjan@hpe.com are

queue-3.18/x86-acpi-handle-sci-interrupts-above-legacy-space-gracefully.patch queue-3.18/x86-acpi-reduce-code-duplication-in-mp_override_legacy_irq.patch