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author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-23 12:29:16 -0800 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-23 12:29:16 -0800 |
commit | b23c9cc0ce652089a2f0af8c7f1541f10dc9b5db (patch) | |
tree | d2e429bbb74c268c071790761e4a2b59d96ea3f7 /drivers/scsi/libsas | |
parent | 1e8352784abaedb424e63fa700e93e6c1307785f (diff) | |
parent | cfb37ae1e9d31fe2c1d21734ab51405e0c3afb7e (diff) | |
download | kernel_samsung_aries-b23c9cc0ce652089a2f0af8c7f1541f10dc9b5db.zip kernel_samsung_aries-b23c9cc0ce652089a2f0af8c7f1541f10dc9b5db.tar.gz kernel_samsung_aries-b23c9cc0ce652089a2f0af8c7f1541f10dc9b5db.tar.bz2 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: (25 commits)
[SCSI] qlogicpt: section fixes
[SCSI] mvsas: convert from rough draft to working driver
[SCSI] mvsas: Add Marvell 6440 SAS/SATA driver
[SCSI] libsas: correctly flush the LU queue on error recovery
[SCSI] aic94xx: fix sequencer hang on error recovery
[SCSI] st: compile fix when DEBUG set to one
[SCSI] stex: stex_internal_copy should be called with sg_count in struct st_ccb
[SCSI] stex: stex_direct_copy shouldn't call dma_map_sg
[SCSI] lpfc: Balance locking
[SCSI] qla4xxx: fix up residual handling
[SCSI] libsas: fix error handling
[SCSI] arcmsr: fix message allocation
[SCSI] mptbase: fix use-after-free's
[SCSI] iscsi transport: make 2 functions static
[SCSI] lpfc: make lpfc_disable_node() static
[SCSI] ips: fix data buffer accessors conversion bug
[SCSI] gdth: don't call pci_free_consistent under spinlock
[SCSI] qla2xxx: fix compile warning for printk format
[SCSI] aic7xx: mitigate HOST_MSG_LOOP invalid SCB ff panic
[SCSI] scsi_debug: disable clustering
...
Diffstat (limited to 'drivers/scsi/libsas')
-rw-r--r-- | drivers/scsi/libsas/sas_scsi_host.c | 68 |
1 files changed, 43 insertions, 25 deletions
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index f869fba..704ea06 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -51,10 +51,14 @@ static void sas_scsi_task_done(struct sas_task *task) { struct task_status_struct *ts = &task->task_status; struct scsi_cmnd *sc = task->uldd_task; - struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(sc->device->host); - unsigned ts_flags = task->task_state_flags; int hs = 0, stat = 0; + if (unlikely(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { + /* Aborted tasks will be completed by the error handler */ + SAS_DPRINTK("task done but aborted\n"); + return; + } + if (unlikely(!sc)) { SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n"); list_del_init(&task->list); @@ -120,11 +124,7 @@ static void sas_scsi_task_done(struct sas_task *task) sc->result = (hs << 16) | stat; list_del_init(&task->list); sas_free_task(task); - /* This is very ugly but this is how SCSI Core works. */ - if (ts_flags & SAS_TASK_STATE_ABORTED) - scsi_eh_finish_cmd(sc, &sas_ha->eh_done_q); - else - sc->scsi_done(sc); + sc->scsi_done(sc); } static enum task_attribute sas_scsi_get_task_attr(struct scsi_cmnd *cmd) @@ -255,13 +255,34 @@ out: return res; } +static void sas_eh_finish_cmd(struct scsi_cmnd *cmd) +{ + struct sas_task *task = TO_SAS_TASK(cmd); + struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host); + + /* remove the aborted task flag to allow the task to be + * completed now. At this point, we only get called following + * an actual abort of the task, so we should be guaranteed not + * to be racing with any completions from the LLD (hence we + * don't need the task state lock to clear the flag) */ + task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; + /* Now call task_done. However, task will be free'd after + * this */ + task->task_done(task); + /* now finish the command and move it on to the error + * handler done list, this also takes it off the + * error handler pending list */ + scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q); +} + static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd) { struct scsi_cmnd *cmd, *n; list_for_each_entry_safe(cmd, n, error_q, eh_entry) { - if (cmd == my_cmd) - list_del_init(&cmd->eh_entry); + if (cmd->device->sdev_target == my_cmd->device->sdev_target && + cmd->device->lun == my_cmd->device->lun) + sas_eh_finish_cmd(cmd); } } @@ -274,7 +295,7 @@ static void sas_scsi_clear_queue_I_T(struct list_head *error_q, struct domain_device *x = cmd_to_domain_dev(cmd); if (x == dev) - list_del_init(&cmd->eh_entry); + sas_eh_finish_cmd(cmd); } } @@ -288,7 +309,7 @@ static void sas_scsi_clear_queue_port(struct list_head *error_q, struct asd_sas_port *x = dev->port; if (x == port) - list_del_init(&cmd->eh_entry); + sas_eh_finish_cmd(cmd); } } @@ -528,14 +549,14 @@ Again: case TASK_IS_DONE: SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__, task); - task->task_done(task); + sas_eh_finish_cmd(cmd); if (need_reset) try_to_reset_cmd_device(shost, cmd); continue; case TASK_IS_ABORTED: SAS_DPRINTK("%s: task 0x%p is aborted\n", __FUNCTION__, task); - task->task_done(task); + sas_eh_finish_cmd(cmd); if (need_reset) try_to_reset_cmd_device(shost, cmd); continue; @@ -547,7 +568,7 @@ Again: "recovered\n", SAS_ADDR(task->dev), cmd->device->lun); - task->task_done(task); + sas_eh_finish_cmd(cmd); if (need_reset) try_to_reset_cmd_device(shost, cmd); sas_scsi_clear_queue_lu(work_q, cmd); @@ -562,7 +583,7 @@ Again: if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { SAS_DPRINTK("I_T %016llx recovered\n", SAS_ADDR(task->dev->sas_addr)); - task->task_done(task); + sas_eh_finish_cmd(cmd); if (need_reset) try_to_reset_cmd_device(shost, cmd); sas_scsi_clear_queue_I_T(work_q, task->dev); @@ -577,7 +598,7 @@ Again: if (res == TMF_RESP_FUNC_COMPLETE) { SAS_DPRINTK("clear nexus port:%d " "succeeded\n", port->id); - task->task_done(task); + sas_eh_finish_cmd(cmd); if (need_reset) try_to_reset_cmd_device(shost, cmd); sas_scsi_clear_queue_port(work_q, @@ -591,10 +612,10 @@ Again: if (res == TMF_RESP_FUNC_COMPLETE) { SAS_DPRINTK("clear nexus ha " "succeeded\n"); - task->task_done(task); + sas_eh_finish_cmd(cmd); if (need_reset) try_to_reset_cmd_device(shost, cmd); - goto out; + goto clear_q; } } /* If we are here -- this means that no amount @@ -606,21 +627,18 @@ Again: SAS_ADDR(task->dev->sas_addr), cmd->device->lun); - task->task_done(task); + sas_eh_finish_cmd(cmd); if (need_reset) try_to_reset_cmd_device(shost, cmd); goto clear_q; } } -out: return list_empty(work_q); clear_q: SAS_DPRINTK("--- Exit %s -- clear_q\n", __FUNCTION__); - list_for_each_entry_safe(cmd, n, work_q, eh_entry) { - struct sas_task *task = TO_SAS_TASK(cmd); - list_del_init(&cmd->eh_entry); - task->task_done(task); - } + list_for_each_entry_safe(cmd, n, work_q, eh_entry) + sas_eh_finish_cmd(cmd); + return list_empty(work_q); } |