efi.get_variable causing Oops

["Karthik Gopalakrishnan" <karthik.g.krishnan@xxxxxxxxx>]

Hi Folks.

   I am calling the following function as the last function in
setup_arch() [well after efi_init()] on a 2.6.19 kernel.

void __init func_foo (void)
{
   unsigned char       data[1024];
   unsigned long       size = sizeof(data);
   char                *Ascii_String;
   efi_char16_t        *Unicode_String;
   char                mode_name[] = "variable_name";
   efi_char16_t        mode_name_utf[32];
   efi_guid_t          guid = CONFIG_GUID;
   efi_status_t        status;
   int                 i;

   Unicode_String = mode_name_utf;
   Ascii_String   = mode_name;
   while (*Ascii_String)
       *Unicode_String++ = *Ascii_String++ & 0x7F;
   *Unicode_String = 0;

   status = efi.get_variable(mode_name_utf, &guid, NULL, &size, data);
   ...
   ...
   ...
}

   The get_variable call is causing an Oops.

Unable to handle kernel NULL pointer dereference (address 0000000000000000)
swapper[0]: Oops 11012296146944 [2]

   Can someone tell me why it is page-faulting? Any suggestions as to
where to start looking?

Thanks & Regards,
Karthik
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