ST_STORE::StDeviceIoIssue

__int64 __fastcall ST_STORE::StDeviceIoIssue(__int64 a1, __int64 *a2){
  NTSTATUS v4; 
  __int64 *v5; 
  __int64 v6; 
  NTSTATUS *v7; 
  unsigned int v8; 
  unsigned int *v9; 
  unsigned int v10; 
  unsigned int v11; 
  unsigned int v12; 
  unsigned int v13; 
  unsigned int v14; 
  __int64 v15; 

  v4 = -2147483634;
  while( 1 )
  {
    v5 = (__int64 *)a2[1];
    if( v5 == a2 )
      break;
    v6 = *a2;
    *a2 = *(_QWORD *)*a2 & 0xFFFFFFFFFFFFFFF8ui64;
    if( (__int64 *)v6 == v5 )
    {
      *a2 = 0i64;
      a2[1] = (__int64)a2;
    }
    else
    {
      *v5 = *v5 & 7 | (8 * ((unsigned __int64)*v5 >> 3) - 8);
    }
    v7 = (NTSTATUS *)(v6 + 8);
    v8 = *(_DWORD *)(v6 + 24);
    v9 = *(unsigned int **)(v6 + 16);
    v10 = -*(_DWORD *)(a1 + 792) & (16 * (v8 & *(_DWORD *)(a1 + 808)));
    v11 = v8 >> *(_DWORD *)(a1 + 812);
    v12 = *(_DWORD *)(v6 + 28);
    v13 = v12 >> 5;
    v14 = v12;
    if( *(_QWORD *)(a1 + 1816) && (v12 & 4) == 0 )
    {
      *(_QWORD *)(v9 + 1) = KeQueryPerformanceCounter(0i64);
      v14 = *(_DWORD *)(v6 + 28);
    }
    StEtaIoStart(
      *(_ST_ETA_CONTEXT **)(a1 + 1000),
      v13,
      StIoTypeRandRead,
      (VOID *)((unsigned __int64)v7 | ((unsigned __int64)v14 >> 3) & 1));
    *(_DWORD *)(v6 + 28) |= 8u;
    v4 = SmIssueIo(
           *(VOID **)(a1 + 800),
           v11,
           v10,
           v13,
           -(__int64)*(unsigned int *)(a1 + 792) & ((unsigned __int64)&v9[4 * *v9 + 2] + *(unsigned int *)(a1 + 792) + 3),
           v6 | 1);
    if( v4 < 0 )
    {
      *(_DWORD *)(v6 + 28) |= 1u;
      v15 = *(_QWORD *)(v6 + 16);
      if( v15 )
        *(_DWORD *)(v15 + 4) = v4;
      else
        *v7 = v4;
      *(_QWORD *)v6 = *(_DWORD *)v6 & 7 | ((*(_QWORD *)a2[1] & 0xFFFFFFFFFFFFFFF8ui64) + 8);
      *(_QWORD *)a2[1] = v6 | *(_DWORD *)a2[1] & 7;
      a2[1] = v6;
      return(unsigned int)v4;
    }
  }
  return(unsigned int)v4;
}

Referenced by: