All commands are issued synchronously, so no need to open-code scsi_execute anymore. Signed-off-by: Hannes Reinecke <hare@xxxxxxx> --- drivers/scsi/device_handler/scsi_dh_alua.c | 119 +++++++---------------------- 1 file changed, 26 insertions(+), 93 deletions(-) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index 0b8e111..0cc18e3 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -103,80 +103,29 @@ static int realloc_buffer(struct alua_dh_data *h, unsigned len) return 0; } -static struct request *get_alua_req(struct scsi_device *sdev, - void *buffer, unsigned buflen, int rw) -{ - struct request *rq; - struct request_queue *q = sdev->request_queue; - - rq = blk_get_request(q, rw, GFP_NOIO); - - if (IS_ERR(rq)) { - sdev_printk(KERN_INFO, sdev, - "%s: blk_get_request failed\n", __func__); - return NULL; - } - blk_rq_set_block_pc(rq); - - if (buflen && blk_rq_map_kern(q, rq, buffer, buflen, GFP_NOIO)) { - blk_put_request(rq); - sdev_printk(KERN_INFO, sdev, - "%s: blk_rq_map_kern failed\n", __func__); - return NULL; - } - - rq->cmd_flags |= REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | - REQ_FAILFAST_DRIVER; - rq->retries = ALUA_FAILOVER_RETRIES; - rq->timeout = ALUA_FAILOVER_TIMEOUT * HZ; - - return rq; -} - /* * submit_rtpg - Issue a REPORT TARGET GROUP STATES command * @sdev: sdev the command should be sent to */ -static unsigned submit_rtpg(struct scsi_device *sdev, unsigned char *buff, +static int submit_rtpg(struct scsi_device *sdev, unsigned char *buff, int bufflen, unsigned char *sense, int flags) { - struct request *rq; - int err; - - rq = get_alua_req(sdev, buff, bufflen, READ); - if (!rq) { - err = DRIVER_BUSY << 24; - goto done; - } + u8 cdb[16]; + int req_flags = REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | + REQ_FAILFAST_DRIVER; /* Prepare the command. */ - rq->cmd[0] = MAINTENANCE_IN; + memset(cdb, 0x0, 16); + cdb[0] = MAINTENANCE_IN; if (!(flags & ALUA_RTPG_EXT_HDR_UNSUPP)) - rq->cmd[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; + cdb[1] = MI_REPORT_TARGET_PGS | MI_EXT_HDR_PARAM_FMT; else - rq->cmd[1] = MI_REPORT_TARGET_PGS; - rq->cmd[6] = (bufflen >> 24) & 0xff; - rq->cmd[7] = (bufflen >> 16) & 0xff; - rq->cmd[8] = (bufflen >> 8) & 0xff; - rq->cmd[9] = bufflen & 0xff; - rq->cmd_len = COMMAND_SIZE(MAINTENANCE_IN); - - rq->sense = sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - err = blk_execute_rq(rq->q, NULL, rq, 1); - if (err < 0) { - if (!rq->errors) - err = DID_ERROR << 16; - else - err = rq->errors; - if (rq->sense_len) - err |= (DRIVER_SENSE << 24); - } - blk_put_request(rq); -done: - return err; + cdb[1] = MI_REPORT_TARGET_PGS; + put_unaligned_be32(bufflen, &cdb[6]); + + return scsi_execute(sdev, cdb, DMA_FROM_DEVICE, buff, bufflen, + sense, ALUA_FAILOVER_TIMEOUT * HZ, + ALUA_FAILOVER_RETRIES, req_flags, NULL); } /* @@ -186,45 +135,29 @@ done: * to 'active/optimized' and let the array firmware figure out * the states of the remaining groups. */ -static unsigned submit_stpg(struct scsi_device *sdev, int group_id, - unsigned char *sense) +static int submit_stpg(struct scsi_device *sdev, int group_id, + unsigned char *sense) { - struct request *rq; + u8 cdb[COMMAND_SIZE(MAINTENANCE_OUT)]; unsigned char stpg_data[8]; int stpg_len = 8; - int err; + int req_flags = REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | + REQ_FAILFAST_DRIVER; /* Prepare the data buffer */ memset(stpg_data, 0, stpg_len); stpg_data[4] = TPGS_STATE_OPTIMIZED & 0x0f; put_unaligned_be16(group_id, &stpg_data[6]); - rq = get_alua_req(sdev, stpg_data, stpg_len, WRITE); - if (!rq) - return SCSI_DH_RES_TEMP_UNAVAIL; - /* Prepare the command. */ - rq->cmd[0] = MAINTENANCE_OUT; - rq->cmd[1] = MO_SET_TARGET_PGS; - put_unaligned_be32(stpg_len, &rq->cmd[6]); - rq->cmd_len = COMMAND_SIZE(MAINTENANCE_OUT); - - rq->sense = sense; - memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE); - rq->sense_len = 0; - - err = blk_execute_rq(rq->q, NULL, rq, 1); - if (err < 0) { - if (!rq->errors) - err = DID_ERROR << 16; - else - err = rq->errors; - if (rq->sense_len) - err |= (DRIVER_SENSE << 24); - } - blk_put_request(rq); - - return err; + memset(cdb, 0x0, COMMAND_SIZE(MAINTENANCE_OUT)); + cdb[0] = MAINTENANCE_OUT; + cdb[1] = MO_SET_TARGET_PGS; + put_unaligned_be32(stpg_len, &cdb[6]); + + return scsi_execute(sdev, cdb, DMA_TO_DEVICE, stpg_data, stpg_len, + sense, ALUA_FAILOVER_TIMEOUT * HZ, + ALUA_FAILOVER_RETRIES, req_flags, NULL); } /* -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html