diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 59 |
1 files changed, 45 insertions, 14 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index ff5d56b3ee4d..98ee55ced592 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -852,7 +852,7 @@ static void scsi_end_bidi_request(struct scsi_cmnd *cmd) void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) { int result = cmd->result; - int this_count = scsi_bufflen(cmd); + int this_count; struct request_queue *q = cmd->device->request_queue; struct request *req = cmd->request; int error = 0; @@ -908,6 +908,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) */ if (scsi_end_request(cmd, error, good_bytes, result == 0) == NULL) return; + this_count = blk_rq_bytes(req); /* good_bytes = 0, or (inclusive) there were leftovers and * result = 0, so scsi_end_request couldn't retry. @@ -1180,7 +1181,6 @@ int scsi_setup_blk_pc_cmnd(struct scsi_device *sdev, struct request *req) cmd->transfersize = req->data_len; cmd->allowed = req->retries; - cmd->timeout_per_command = req->timeout; return BLKPREP_OK; } EXPORT_SYMBOL(scsi_setup_blk_pc_cmnd); @@ -1250,6 +1250,7 @@ int scsi_prep_state_check(struct scsi_device *sdev, struct request *req) break; case SDEV_QUIESCE: case SDEV_BLOCK: + case SDEV_CREATED_BLOCK: /* * If the devices is blocked we defer normal commands. */ @@ -1415,17 +1416,26 @@ static void scsi_kill_request(struct request *req, struct request_queue *q) spin_unlock(shost->host_lock); spin_lock(sdev->request_queue->queue_lock); - __scsi_done(cmd); + blk_complete_request(req); } static void scsi_softirq_done(struct request *rq) { - struct scsi_cmnd *cmd = rq->completion_data; - unsigned long wait_for = (cmd->allowed + 1) * cmd->timeout_per_command; + struct scsi_cmnd *cmd = rq->special; + unsigned long wait_for = (cmd->allowed + 1) * rq->timeout; int disposition; INIT_LIST_HEAD(&cmd->eh_entry); + /* + * Set the serial numbers back to zero + */ + cmd->serial_number = 0; + + atomic_inc(&cmd->device->iodone_cnt); + if (cmd->result) + atomic_inc(&cmd->device->ioerr_cnt); + disposition = scsi_decide_disposition(cmd); if (disposition != SUCCESS && time_before(cmd->jiffies_at_alloc + wait_for, jiffies)) { @@ -1674,6 +1684,7 @@ struct request_queue *scsi_alloc_queue(struct scsi_device *sdev) blk_queue_prep_rq(q, scsi_prep_fn); blk_queue_softirq_done(q, scsi_softirq_done); + blk_queue_rq_timed_out(q, scsi_times_out); return q; } @@ -2063,10 +2074,13 @@ scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state) switch (state) { case SDEV_CREATED: - /* There are no legal states that come back to - * created. This is the manually initialised start - * state */ - goto illegal; + switch (oldstate) { + case SDEV_CREATED_BLOCK: + break; + default: + goto illegal; + } + break; case SDEV_RUNNING: switch (oldstate) { @@ -2104,8 +2118,17 @@ scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state) case SDEV_BLOCK: switch (oldstate) { - case SDEV_CREATED: case SDEV_RUNNING: + case SDEV_CREATED_BLOCK: + break; + default: + goto illegal; + } + break; + + case SDEV_CREATED_BLOCK: + switch (oldstate) { + case SDEV_CREATED: break; default: goto illegal; @@ -2393,8 +2416,12 @@ scsi_internal_device_block(struct scsi_device *sdev) int err = 0; err = scsi_device_set_state(sdev, SDEV_BLOCK); - if (err) - return err; + if (err) { + err = scsi_device_set_state(sdev, SDEV_CREATED_BLOCK); + + if (err) + return err; + } /* * The device has transitioned to SDEV_BLOCK. Stop the @@ -2437,8 +2464,12 @@ scsi_internal_device_unblock(struct scsi_device *sdev) * and goose the device queue if successful. */ err = scsi_device_set_state(sdev, SDEV_RUNNING); - if (err) - return err; + if (err) { + err = scsi_device_set_state(sdev, SDEV_CREATED); + + if (err) + return err; + } spin_lock_irqsave(q->queue_lock, flags); blk_start_queue(q); |