diff options
| author | Len Brown <len.brown@intel.com> | 2007-11-23 20:08:02 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-12-14 02:36:24 -0500 |
| commit | 239665a3bb0a2234980f918913add31bc536cfd1 (patch) | |
| tree | 260262706ce5223bf3d1cec0e8083ea42260f2fb /arch/x86/kernel/srat_32.c | |
| parent | 2ffbb8377c7a0713baf6644e285adc27a5654582 (diff) | |
| download | op-kernel-dev-239665a3bb0a2234980f918913add31bc536cfd1.zip op-kernel-dev-239665a3bb0a2234980f918913add31bc536cfd1.tar.gz | |
ACPI: tables: complete searching upon RSDP w/ bad checksum.
ACPI tables follow a tree structure in memory.
The root of the tree is the RSDP (Root System Description Pointer).
To find the RSDP, the OS searches for the signature "RSD PTR "
in well known physical memory locations. Then the OS computes
a table checksum to verify that the signature is really part
of a valid table header.
Some systems have a proper signature but an invalid checksum;
followed elsewhere by a proper signature with valid checksum.
http://bugzilla.kernel.org/show_bug.cgi?id=9444
The Linux RSDP scanning code bailed out on those systems
and as a result they booted with ACPI disabled.
Fix this by deleting the Linux RSDP scanning code and
plugging in the ACPICA RSDP scanning code.
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/x86/kernel/srat_32.c')
| -rw-r--r-- | arch/x86/kernel/srat_32.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/srat_32.c b/arch/x86/kernel/srat_32.c index 2a8713e..b3b2c95 100644 --- a/arch/x86/kernel/srat_32.c +++ b/arch/x86/kernel/srat_32.c @@ -276,7 +276,7 @@ int __init get_memcfg_from_srat(void) int tables = 0; int i = 0; - rsdp_address = acpi_find_rsdp(); + rsdp_address = acpi_os_get_root_pointer(); if (!rsdp_address) { printk("%s: System description tables not found\n", __FUNCTION__); |
