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ACPI: processor: refactor internal map_lsapic_id()

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Un-nest the if statements for readability.

Remove comments that re-state the obvious.

Change the control flow so that we no longer need a temp variable.

Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alex Chiang 2010-02-22 12:11:55 -07:00 committed by Len Brown
parent d67420956b
commit eae701cead
1 changed files with 5 additions and 15 deletions
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20
drivers/acpi/processor_core.c
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@ -83,27 +83,17 @@ static int map_lsapic_id(struct acpi_subtable_header *entry,
{
struct acpi_madt_local_sapic *lsapic =
(struct acpi_madt_local_sapic *)entry;
u32 tmp = (lsapic->id << 8) | lsapic->eid;
/* Only check enabled APICs*/
if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
return 0;
/* Device statement declaration type */
if (device_declaration) {
if (entry->length < 16)
printk(KERN_ERR PREFIX
"Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n",
tmp);
else if (lsapic->uid == acpi_id)
goto found;
/* Processor statement declaration type */
} else if (lsapic->processor_id == acpi_id)
goto found;
if ((entry->length < 16) || (lsapic->uid != acpi_id))
return 0;
} else if (lsapic->processor_id != acpi_id)
return 0;
return 0;
found:
*apic_id = tmp;
*apic_id = (lsapic->id << 8) | lsapic->eid;
return 1;
}