> > for rq->cmd_flags. It will cause dix=0 in function > > sd_setup_read_write_cmnd() when enabled DIX, which will cause IO > > exception when enabled DIX. > > > > For some IOs such as internal IO from SCSI layer, the parameter bio of > > function blk_mq_get_request() is Null, so need to check bio to > > decise rq->cmd_flags. We have data->cmd_flags to deal with the NULL bio case. blk_mq_make_request initializes data->cmd_flags from bio->bi_opf just before calling blk_mq_get_request, so I'm really missing what you are trying to fix here.
