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path: root/drivers/scsi/libsas/sas_scsi_host.c
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Diffstat (limited to 'drivers/scsi/libsas/sas_scsi_host.c')
-rw-r--r--drivers/scsi/libsas/sas_scsi_host.c38
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 5cc44fddfe9..94ef76316c3 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;