diff options
Diffstat (limited to 'drivers/scsi/scsi_error.c')
| -rw-r--r-- | drivers/scsi/scsi_error.c | 72 |
1 files changed, 65 insertions, 7 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index fecefa05cb6..94ed262bdf0 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -1065,10 +1065,10 @@ static int scsi_eh_target_reset(struct Scsi_Host *shost, struct list_head *done_q) { struct scsi_cmnd *scmd, *tgtr_scmd, *next; - unsigned int id; + unsigned int id = 0; int rtn; - for (id = 0; id <= shost->max_id; id++) { + do { tgtr_scmd = NULL; list_for_each_entry(scmd, work_q, eh_entry) { if (id == scmd_id(scmd)) { @@ -1076,8 +1076,18 @@ static int scsi_eh_target_reset(struct Scsi_Host *shost, break; } } + if (!tgtr_scmd) { + /* not one exactly equal; find the next highest */ + list_for_each_entry(scmd, work_q, eh_entry) { + if (scmd_id(scmd) > id && + (!tgtr_scmd || + scmd_id(tgtr_scmd) > scmd_id(scmd))) + tgtr_scmd = scmd; + } + } if (!tgtr_scmd) - continue; + /* no more commands, that's it */ + break; SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Sending target reset " "to target %d\n", @@ -1096,7 +1106,8 @@ static int scsi_eh_target_reset(struct Scsi_Host *shost, " failed target: " "%d\n", current->comm, id)); - } + id++; + } while(id != 0); return list_empty(work_q); } @@ -1219,6 +1230,40 @@ static void scsi_eh_offline_sdevs(struct list_head *work_q, } /** + * scsi_noretry_cmd - determinte if command should be failed fast + * @scmd: SCSI cmd to examine. + */ +int scsi_noretry_cmd(struct scsi_cmnd *scmd) +{ + switch (host_byte(scmd->result)) { + case DID_OK: + break; + case DID_BUS_BUSY: + return blk_failfast_transport(scmd->request); + case DID_PARITY: + return blk_failfast_dev(scmd->request); + case DID_ERROR: + if (msg_byte(scmd->result) == COMMAND_COMPLETE && + status_byte(scmd->result) == RESERVATION_CONFLICT) + return 0; + /* fall through */ + case DID_SOFT_ERROR: + return blk_failfast_driver(scmd->request); + } + + switch (status_byte(scmd->result)) { + case CHECK_CONDITION: + /* + * assume caller has checked sense and determinted + * the check condition was retryable. + */ + return blk_failfast_dev(scmd->request); + } + + return 0; +} + +/** * scsi_decide_disposition - Disposition a cmd on return from LLD. * @scmd: SCSI cmd to examine. * @@ -1290,7 +1335,20 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) case DID_REQUEUE: return ADD_TO_MLQUEUE; - + case DID_TRANSPORT_DISRUPTED: + /* + * LLD/transport was disrupted during processing of the IO. + * The transport class is now blocked/blocking, + * and the transport will decide what to do with the IO + * based on its timers and recovery capablilities. + */ + return ADD_TO_MLQUEUE; + case DID_TRANSPORT_FAILFAST: + /* + * The transport decided to failfast the IO (most likely + * the fast io fail tmo fired), so send IO directly upwards. + */ + return SUCCESS; case DID_ERROR: if (msg_byte(scmd->result) == COMMAND_COMPLETE && status_byte(scmd->result) == RESERVATION_CONFLICT) @@ -1383,7 +1441,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) * even if the request is marked fast fail, we still requeue * for queue congestion conditions (QUEUE_FULL or BUSY) */ if ((++scmd->retries) <= scmd->allowed - && !blk_noretry_request(scmd->request)) { + && !scsi_noretry_cmd(scmd)) { return NEEDS_RETRY; } else { /* @@ -1508,7 +1566,7 @@ void scsi_eh_flush_done_q(struct list_head *done_q) list_for_each_entry_safe(scmd, next, done_q, eh_entry) { list_del_init(&scmd->eh_entry); if (scsi_device_online(scmd->device) && - !blk_noretry_request(scmd->request) && + !scsi_noretry_cmd(scmd) && (++scmd->retries <= scmd->allowed)) { SCSI_LOG_ERROR_RECOVERY(3, printk("%s: flush" " retry cmd: %p\n", |