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Created attachment 506215 [details]
Patch to fix SPMITable struct.

Description of problem:

drivers/char/ipmi/ipmi_si_intf.c:

struct SPMITable {
        s8      Signature[4];
        u32     Length;
        u8      Revision;
        u8      Checksum;
        s8      OEMID[6];
        s8      OEMTableID[8];
        s8      OEMRevision[4];
        s8      CreatorID[4];
        s8      CreatorRevision[4];
        u8      InterfaceType;
        u8      IPMIlegacy;
        s16     SpecificationRevision;
[...]

According to ftp://download.intel.com/design/servers/ipmi/IPMIv2_0rev1_0.pdf
(and also http://sysdoc.doors.ch/HP/hpspmi.pdf formerly referenced
in the sources), the order of SPMITable.{IPMIlegacy,Interface} is wrong.
The structure should be like this:

struct SPMITable {
        s8      Signature[4];
        u32     Length;
        u8      Revision;
        u8      Checksum;
        s8      OEMID[6];
        s8      OEMTableID[8];
        s8      OEMRevision[4];
        s8      CreatorID[4];
        s8      CreatorRevision[4];
        u8      IPMIlegacy;     <=== these two
        u8      InterfaceType;  <=== swapped
        s16     SpecificationRevision;
[...]

It seems I spoke to soon: the latest IPMI specificatin errata at http://download.intel.com/design/servers/ipmi/IPMI2_0E4_061209.pdf
shows the order of SPMITable.{InterfaceType,IPMILegacy} is correct in the sources.
Thus, this is not a bug.

Closing based on comment #1.

P.