From 5319578ca38a8b90b6d0270c194c65d1dd8f7725 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sat, 23 Feb 2008 23:35:44 -0600 Subject: [SCSI] libsas: export sas_find_local_phy function This is needed by the to be added I_T reset function in aic94xx. It needs to know the local phy so it can send a link or hard reset along the path. Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_scsi_host.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/libsas/sas_scsi_host.c') diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 704ea06a6e50..f3706f4b79ce 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -434,7 +434,7 @@ static int sas_recover_I_T(struct domain_device *dev) } /* Find the sas_phy that's attached to this device */ -static struct sas_phy *find_local_sas_phy(struct domain_device *dev) +struct sas_phy *sas_find_local_phy(struct domain_device *dev) { struct domain_device *pdev = dev->parent; struct ex_phy *exphy = NULL; @@ -456,6 +456,7 @@ static struct sas_phy *find_local_sas_phy(struct domain_device *dev) BUG_ON(!exphy); return exphy->phy; } +EXPORT_SYMBOL_GPL(sas_find_local_phy); /* Attempt to send a LUN reset message to a device */ int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) @@ -482,7 +483,7 @@ int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) { struct domain_device *dev = cmd_to_domain_dev(cmd); - struct sas_phy *phy = find_local_sas_phy(dev); + struct sas_phy *phy = sas_find_local_phy(dev); int res; res = sas_phy_reset(phy, 1); -- cgit v1.2.3 From 8de3ef25a1fcd28d270b69417a41b424826d4f89 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sat, 23 Feb 2008 23:39:59 -0600 Subject: [SCSI] libsas: misc fixes to the eh path - Correct one use after free of the sas task - update the reset required path to move straight to LUN reset - make the bigger hammer actually reset something instead of just trying to clear all the tasks. Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_scsi_host.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-) (limited to 'drivers/scsi/libsas/sas_scsi_host.c') diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index f3706f4b79ce..1f8241563c6c 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -498,10 +498,10 @@ int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) } /* Try to reset a device */ -static int try_to_reset_cmd_device(struct Scsi_Host *shost, - struct scsi_cmnd *cmd) +static int try_to_reset_cmd_device(struct scsi_cmnd *cmd) { int res; + struct Scsi_Host *shost = cmd->device->host; if (!shost->hostt->eh_device_reset_handler) goto try_bus_reset; @@ -541,6 +541,12 @@ Again: need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET; spin_unlock_irqrestore(&task->task_state_lock, flags); + if (need_reset) { + SAS_DPRINTK("%s: task 0x%p requests reset\n", + __FUNCTION__, task); + goto reset; + } + SAS_DPRINTK("trying to find task 0x%p\n", task); res = sas_scsi_find_task(task); @@ -551,18 +557,15 @@ Again: SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__, 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); sas_eh_finish_cmd(cmd); - if (need_reset) - try_to_reset_cmd_device(shost, cmd); continue; case TASK_IS_AT_LU: SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task); + reset: tmf_resp = sas_recover_lu(task->dev, cmd); if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { SAS_DPRINTK("dev %016llx LU %x is " @@ -570,8 +573,6 @@ Again: SAS_ADDR(task->dev), cmd->device->lun); sas_eh_finish_cmd(cmd); - if (need_reset) - try_to_reset_cmd_device(shost, cmd); sas_scsi_clear_queue_lu(work_q, cmd); goto Again; } @@ -582,15 +583,15 @@ Again: task); tmf_resp = sas_recover_I_T(task->dev); if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { + struct domain_device *dev = task->dev; SAS_DPRINTK("I_T %016llx recovered\n", SAS_ADDR(task->dev->sas_addr)); 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); + sas_scsi_clear_queue_I_T(work_q, dev); goto Again; } /* Hammer time :-) */ + try_to_reset_cmd_device(cmd); if (i->dft->lldd_clear_nexus_port) { struct asd_sas_port *port = task->dev->port; SAS_DPRINTK("clearing nexus for port:%d\n", @@ -600,8 +601,6 @@ Again: SAS_DPRINTK("clear nexus port:%d " "succeeded\n", port->id); sas_eh_finish_cmd(cmd); - if (need_reset) - try_to_reset_cmd_device(shost, cmd); sas_scsi_clear_queue_port(work_q, port); goto Again; @@ -614,8 +613,6 @@ Again: SAS_DPRINTK("clear nexus ha " "succeeded\n"); sas_eh_finish_cmd(cmd); - if (need_reset) - try_to_reset_cmd_device(shost, cmd); goto clear_q; } } @@ -629,8 +626,6 @@ Again: cmd->device->lun); sas_eh_finish_cmd(cmd); - if (need_reset) - try_to_reset_cmd_device(shost, cmd); goto clear_q; } } -- cgit v1.2.3