x86: use dstapic in mp_config_acpi_legacy_irqs

so we don't get the same value multiple times.

also make mp_config_acpi_legacy_irqs more readable by moving assignments
together.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 13 insertions, 13 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 4d370b1c5ae8..29b365a66cf3 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -962,8 +962,8 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
 
 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 {
-        int ioapic = -1;
-        int pin = -1;
+        int ioapic;
+        int pin;
 
         /*
          * Convert 'gsi' to 'ioapic.pin'.
@@ -997,8 +997,9 @@ void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 
 void __init mp_config_acpi_legacy_irqs(void)
 {
-        int i = 0;
-        int ioapic = -1;
+        int i;
+        int ioapic;
+        unsigned int dstapic;
 
 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
         /*
@@ -1023,6 +1024,7 @@ void __init mp_config_acpi_legacy_irqs(void)
         ioapic = mp_find_ioapic(0);
         if (ioapic < 0)
                 return;
+        dstapic = mp_ioapics[ioapic].mp_apicid;
 
         /*
          * Use the default configuration for the IRQs 0-15.  Unless
@@ -1031,11 +1033,6 @@ void __init mp_config_acpi_legacy_irqs(void)
         for (i = 0; i < 16; i++) {
                 int idx;
 
-                mp_irqs[mp_irq_entries].mp_type = MP_INTSRC;
-                mp_irqs[mp_irq_entries].mp_irqflag = 0; /* Conforming */
-                mp_irqs[mp_irq_entries].mp_srcbus = MP_ISA_BUS;
-                mp_irqs[mp_irq_entries].mp_dstapic = mp_ioapics[ioapic].mp_apicid;
-
                 for (idx = 0; idx < mp_irq_entries; idx++) {
                         struct mp_config_intsrc *irq = mp_irqs + idx;
 
@@ -1045,9 +1042,8 @@ void __init mp_config_acpi_legacy_irqs(void)
                                 break;
 
                         /* Do we already have a mapping for this IOAPIC pin */
-                        if ((irq->mp_dstapic ==
-                                mp_irqs[mp_irq_entries].mp_dstapic) &&
-                            (irq->mp_dstirq == i))
+                        if (irq->mp_dstapic == dstapic &&
+                            irq->mp_dstirq == i)
                                 break;
                 }
 
@@ -1056,8 +1052,12 @@ void __init mp_config_acpi_legacy_irqs(void)
                         continue;       /* IRQ already used */
                 }
 
+                mp_irqs[mp_irq_entries].mp_type = MP_INTSRC;
+                mp_irqs[mp_irq_entries].mp_irqflag = 0; /* Conforming */
+                mp_irqs[mp_irq_entries].mp_srcbus = MP_ISA_BUS;
+                mp_irqs[mp_irq_entries].mp_dstapic = dstapic;
                 mp_irqs[mp_irq_entries].mp_irqtype = mp_INT;
-                mp_irqs[mp_irq_entries].mp_srcbusirq = i;       /* Identity mapped */
+                mp_irqs[mp_irq_entries].mp_srcbusirq = i; /* Identity mapped */
                 mp_irqs[mp_irq_entries].mp_dstirq = i;
 
                 if (++mp_irq_entries == MAX_IRQ_SOURCES)