1. 17 Jan, 2012 1 commit
    • Lin Ming's avatar
      ACPI: processor: fix acpi_get_cpuid for UP processor · d640113f
      Lin Ming authored
      For UP processor, it is likely that no _MAT method or MADT table defined.
      So currently acpi_get_cpuid(...) always return -1 for UP processor.
      This is wrong. It should return valid value for CPU0.
      
      In the other hand, BIOS may define multiple CPU handles even for UP
      processor, for example
      
              Scope (_PR)
              {
                  Processor (CPU0, 0x00, 0x00000410, 0x06) {}
                  Processor (CPU1, 0x01, 0x00000410, 0x06) {}
                  Processor (CPU2, 0x02, 0x00000410, 0x06) {}
                  Processor (CPU3, 0x03, 0x00000410, 0x06) {}
              }
      
      We should only return valid value for CPU0's acpi handle.
      And return invalid value for others.
      
      http://marc.info/?t=132329819900003&r=1&w=2
      
      Cc: stable@vger.kernel.org
      Reported-and-tested-by: wallak@free.fr
      Signed-off-by: default avatarLin Ming <ming.m.lin@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      d640113f
  2. 04 Jan, 2012 13 commits
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