[PATCH 10/12] ACPI: processor: refactor internal map_lsapic_id()

Alex Chiang
2010-01-25T21:41:29Z

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.

Signed-off-by: Alex Chiang <achiang@hp.com>
---

drivers/acpi/processor_core.c | 20 +++++---------------
1 files changed, 5 insertions(+), 15 deletions(-)

diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 9213f95..ec5989c 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -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;
}