ARCMSR_MAX_SG_ENTRIES
if(nseg > ARCMSR_MAX_SG_ENTRIES) {
/*maxsize*/ ARCMSR_MAX_SG_ENTRIES * PAGE_SIZE * ARCMSR_MAX_FREESRB_NUM,
/*nsegments*/ ARCMSR_MAX_SG_ENTRIES,
struct SG32ENTRY sg32entry[ARCMSR_MAX_SG_ENTRIES]; /* 30h Scatter gather address */
struct SG64ENTRY sg64entry[ARCMSR_MAX_SG_ENTRIES]; /* 30h */