diff options
Diffstat (limited to 'drivers/scsi/libsas/sas_scsi_host.c')
| -rw-r--r-- | drivers/scsi/libsas/sas_scsi_host.c | 38 |
1 files changed, 18 insertions, 20 deletions
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 5cc44fddfe95..94ef76316c31 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -439,30 +439,26 @@ static int sas_recover_I_T(struct domain_device *dev) return res; } -/* Find the sas_phy that's attached to this device */ -struct sas_phy *sas_find_local_phy(struct domain_device *dev) +/* take a reference on the last known good phy for this device */ +struct sas_phy *sas_get_local_phy(struct domain_device *dev) { - struct domain_device *pdev = dev->parent; - struct ex_phy *exphy = NULL; - int i; + struct sas_ha_struct *ha = dev->port->ha; + struct sas_phy *phy; + unsigned long flags; - /* Directly attached device */ - if (!pdev) - return dev->port->phy; + /* a published domain device always has a valid phy, it may be + * stale, but it is never NULL + */ + BUG_ON(!dev->phy); - /* Otherwise look in the expander */ - for (i = 0; i < pdev->ex_dev.num_phys; i++) - if (!memcmp(dev->sas_addr, - pdev->ex_dev.ex_phy[i].attached_sas_addr, - SAS_ADDR_SIZE)) { - exphy = &pdev->ex_dev.ex_phy[i]; - break; - } + spin_lock_irqsave(&ha->phy_port_lock, flags); + phy = dev->phy; + get_device(&phy->dev); + spin_unlock_irqrestore(&ha->phy_port_lock, flags); - BUG_ON(!exphy); - return exphy->phy; + return phy; } -EXPORT_SYMBOL_GPL(sas_find_local_phy); +EXPORT_SYMBOL_GPL(sas_get_local_phy); /* Attempt to send a LUN reset message to a device */ int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) @@ -489,7 +485,7 @@ 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 = sas_find_local_phy(dev); + struct sas_phy *phy = sas_get_local_phy(dev); int res; res = sas_phy_reset(phy, 1); @@ -497,6 +493,8 @@ int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd) SAS_DPRINTK("Bus reset of %s failed 0x%x\n", kobject_name(&phy->dev.kobj), res); + sas_put_local_phy(phy); + if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) return SUCCESS; |