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[SCSI] pm8001: enhance error handle for IO patch

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Enhance error handle for IO patch, when the port is down, fast return phy
down for task.

Signed-off-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
jack wang
2009-12-07 17:22:42 +08:00
committed by James Bottomley
parent 9e79e12554
commit 1cc943ae50
4 changed files with 84 additions and 5 deletions
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49
drivers/scsi/pm8001/pm8001_sas.c
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@@ -329,6 +329,23 @@ int pm8001_slave_configure(struct scsi_device *sdev)
}
return 0;
}
/* Find the local port id that's attached to this device */
static int sas_find_local_port_id(struct domain_device *dev)
{
struct domain_device *pdev = dev->parent;
/* Directly attached device */
if (!pdev)
return dev->port->id;
while (pdev) {
struct domain_device *pdev_p = pdev->parent;
if (!pdev_p)
return pdev->port->id;
pdev = pdev->parent;
}
return 0;
}
/**
* pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
* @task: the task to be execute.
@@ -346,11 +363,12 @@ static int pm8001_task_exec(struct sas_task *task, const int num,
struct domain_device *dev = task->dev;
struct pm8001_hba_info *pm8001_ha;
struct pm8001_device *pm8001_dev;
struct pm8001_port *port = NULL;
struct sas_task *t = task;
struct pm8001_ccb_info *ccb;
u32 tag = 0xdeadbeef, rc, n_elem = 0;
u32 n = num;
unsigned long flags = 0;
unsigned long flags = 0, flags_libsas = 0;
if (!dev->port) {
struct task_status_struct *tsm = &t->task_status;
@@ -379,6 +397,35 @@ static int pm8001_task_exec(struct sas_task *task, const int num,
rc = SAS_PHY_DOWN;
goto out_done;
}
port = &pm8001_ha->port[sas_find_local_port_id(dev)];
if (!port->port_attached) {
if (sas_protocol_ata(t->task_proto)) {
struct task_status_struct *ts = &t->task_status;
ts->resp = SAS_TASK_UNDELIVERED;
ts->stat = SAS_PHY_DOWN;
spin_unlock_irqrestore(&pm8001_ha->lock, flags);
spin_unlock_irqrestore(dev->sata_dev.ap->lock,
flags_libsas);
t->task_done(t);
spin_lock_irqsave(dev->sata_dev.ap->lock,
flags_libsas);
spin_lock_irqsave(&pm8001_ha->lock, flags);
if (n > 1)
t = list_entry(t->list.next,
struct sas_task, list);
continue;
} else {
struct task_status_struct *ts = &t->task_status;
ts->resp = SAS_TASK_UNDELIVERED;
ts->stat = SAS_PHY_DOWN;
t->task_done(t);
if (n > 1)
t = list_entry(t->list.next,
struct sas_task, list);
continue;
}
}
rc = pm8001_tag_alloc(pm8001_ha, &tag);
if (rc)
goto err_out;