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x86: acpi: Fix madt lapic generation

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An accumulated length was incorrectly added to current each pass
through the loop. On system with more than 2 cores this caused a
corrupt MADT to be generated.

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
George McCollister 2016-06-07 13:40:18 -05:00 • committed by Bin Meng
parent 6b3943f1b0
commit 8a1a7595cf
1 changed files with 6 additions and 6 deletions
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12
arch/x86/lib/acpi_table.c
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@ -183,20 +183,20 @@ static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic,
int acpi_create_madt_lapics(u32 current) int acpi_create_madt_lapics(u32 current)
{ {
struct udevice *dev; struct udevice *dev;
int length = 0; int total_length = 0;
for (uclass_find_first_device(UCLASS_CPU, &dev); for (uclass_find_first_device(UCLASS_CPU, &dev);
dev; dev;
uclass_find_next_device(&dev)) { uclass_find_next_device(&dev)) {
struct cpu_platdata *plat = dev_get_parent_platdata(dev); struct cpu_platdata *plat = dev_get_parent_platdata(dev);
int length = acpi_create_madt_lapic(
length += acpi_create_madt_lapic( (struct acpi_madt_lapic *)current,
(struct acpi_madt_lapic *)current, plat->cpu_id, plat->cpu_id);
plat->cpu_id, plat->cpu_id);
current += length; current += length;
total_length += length;
} }
return length; return total_length;
} }
int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id, int acpi_create_madt_ioapic(struct acpi_madt_ioapic *ioapic, u8 id,