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Subject[PATCH 4.9 24/96] x86/acpi: Reduce code duplication in mp_override_legacy_irq()
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

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@hpe.com
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
@@ -335,13 +335,12 @@ 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.
*/
@@ -351,14 +350,6 @@ 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!
@@ -366,16 +357,8 @@ 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

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