diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
-rw-r--r-- | drivers/scsi/scsi_lib.c | 66 |
1 files changed, 39 insertions, 27 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 045822b..9f841df 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1073,15 +1073,7 @@ static struct scsi_cmnd *scsi_get_cmd_from_req(struct scsi_device *sdev, int scsi_setup_blk_pc_cmnd(struct scsi_device *sdev, struct request *req) { - struct scsi_cmnd *cmd; - int ret = scsi_prep_state_check(sdev, req); - - if (ret != BLKPREP_OK) - return ret; - - cmd = scsi_get_cmd_from_req(sdev, req); - if (unlikely(!cmd)) - return BLKPREP_DEFER; + struct scsi_cmnd *cmd = req->special; /* * BLOCK_PC requests may transfer data, in which case they must @@ -1125,15 +1117,11 @@ EXPORT_SYMBOL(scsi_setup_blk_pc_cmnd); */ int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req) { - struct scsi_cmnd *cmd; - int ret = scsi_prep_state_check(sdev, req); - - if (ret != BLKPREP_OK) - return ret; + struct scsi_cmnd *cmd = req->special; if (unlikely(sdev->scsi_dh_data && sdev->scsi_dh_data->scsi_dh && sdev->scsi_dh_data->scsi_dh->prep_fn)) { - ret = sdev->scsi_dh_data->scsi_dh->prep_fn(sdev, req); + int ret = sdev->scsi_dh_data->scsi_dh->prep_fn(sdev, req); if (ret != BLKPREP_OK) return ret; } @@ -1143,16 +1131,13 @@ int scsi_setup_fs_cmnd(struct scsi_device *sdev, struct request *req) */ BUG_ON(!req->nr_phys_segments); - cmd = scsi_get_cmd_from_req(sdev, req); - if (unlikely(!cmd)) - return BLKPREP_DEFER; - memset(cmd->cmnd, 0, BLK_MAX_CDB); return scsi_init_io(cmd, GFP_ATOMIC); } EXPORT_SYMBOL(scsi_setup_fs_cmnd); -int scsi_prep_state_check(struct scsi_device *sdev, struct request *req) +static int +scsi_prep_state_check(struct scsi_device *sdev, struct request *req) { int ret = BLKPREP_OK; @@ -1204,9 +1189,9 @@ int scsi_prep_state_check(struct scsi_device *sdev, struct request *req) } return ret; } -EXPORT_SYMBOL(scsi_prep_state_check); -int scsi_prep_return(struct request_queue *q, struct request *req, int ret) +static int +scsi_prep_return(struct request_queue *q, struct request *req, int ret) { struct scsi_device *sdev = q->queuedata; @@ -1237,18 +1222,44 @@ int scsi_prep_return(struct request_queue *q, struct request *req, int ret) return ret; } -EXPORT_SYMBOL(scsi_prep_return); -int scsi_prep_fn(struct request_queue *q, struct request *req) +static int scsi_prep_fn(struct request_queue *q, struct request *req) { struct scsi_device *sdev = q->queuedata; - int ret = BLKPREP_KILL; + struct scsi_cmnd *cmd; + int ret; - if (req->cmd_type == REQ_TYPE_BLOCK_PC) + ret = scsi_prep_state_check(sdev, req); + if (ret != BLKPREP_OK) + goto out; + + cmd = scsi_get_cmd_from_req(sdev, req); + if (unlikely(!cmd)) { + ret = BLKPREP_DEFER; + goto out; + } + + if (req->cmd_type == REQ_TYPE_FS) + ret = scsi_cmd_to_driver(cmd)->init_command(cmd); + else if (req->cmd_type == REQ_TYPE_BLOCK_PC) ret = scsi_setup_blk_pc_cmnd(sdev, req); + else + ret = BLKPREP_KILL; + +out: return scsi_prep_return(q, req, ret); } -EXPORT_SYMBOL(scsi_prep_fn); + +static void scsi_unprep_fn(struct request_queue *q, struct request *req) +{ + if (req->cmd_type == REQ_TYPE_FS) { + struct scsi_cmnd *cmd = req->special; + struct scsi_driver *drv = scsi_cmd_to_driver(cmd); + + if (drv->uninit_command) + drv->uninit_command(cmd); + } +} /* * scsi_dev_queue_ready: if we can send requests to sdev, return 1 else @@ -1669,6 +1680,7 @@ struct request_queue *scsi_alloc_queue(struct scsi_device *sdev) return NULL; blk_queue_prep_rq(q, scsi_prep_fn); + blk_queue_unprep_rq(q, scsi_unprep_fn); blk_queue_softirq_done(q, scsi_softirq_done); blk_queue_rq_timed_out(q, scsi_times_out); blk_queue_lld_busy(q, scsi_lld_busy); |