if(data)
retval = mtd->read(mtd,addr,dev->nBytesPerChunk,&dummy,data);
if(tags)
retval = mtd->read_oob(mtd,addr,mtd->oobsize,&dummy,dev->spareBuffer);
if(data)
retval = mtd->read(mtd,addr,dev->nBytesPerChunk,&dummy,data);
if(tags)
retval = mtd->read_oob(mtd,addr,mtd->oobsize,&dummy,dev->spareBuffer);