[PATCH v5 07/18] ARM64 / ACPI: If we chose to boot from acpi then disable FDT

From: Hanjun Guo
Date: Fri Oct 17 2014 - 09:39:11 EST


From: Graeme Gregory <graeme.gregory@xxxxxxxxxx>

If the early boot methods of acpi are happy that we have valid ACPI
tables and acpi=force has been passed, then do not unflat devicetree
effectively disabling further hardware probing from DT.

Signed-off-by: Graeme Gregory <graeme.gregory@xxxxxxxxxx>
Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
---
arch/arm64/kernel/setup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 15621b9..e4f2576 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -401,7 +401,8 @@ void __init setup_arch(char **cmdline_p)
efi_idmap_init();

cpu_logical_map(0) = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
- unflatten_device_tree();
+ if (acpi_disabled)
+ unflatten_device_tree();

psci_init();

--
1.7.9.5

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