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| author | James Bottomley <James.Bottomley@steeleye.com> | 2006-07-09 12:38:19 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-07-12 09:03:20 -0400 |
| commit | a0e1b6ef3b851fe6f1dcc259432e83de79ce5e7f (patch) | |
| tree | 4e62bf64d66e2a07cdad6480441a2a443246e3cb /drivers/scsi | |
| parent | 631c228cd09bd5b93090fa60bd9803ec14aa0586 (diff) | |
| download | lwn-a0e1b6ef3b851fe6f1dcc259432e83de79ce5e7f.tar.gz lwn-a0e1b6ef3b851fe6f1dcc259432e83de79ce5e7f.zip | |
[SCSI] scsi_transport_sas: add expander backlink
This patch adds the ability to add a backlink to a particular port. The
idea is to represent properly ports on expanders that are used
specifically for linking to the parent device in the topology.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/scsi_transport_sas.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c index 9bb4e37a1a61..7871bc25fafb 100644 --- a/drivers/scsi/scsi_transport_sas.c +++ b/drivers/scsi/scsi_transport_sas.c @@ -692,6 +692,13 @@ void sas_port_delete(struct sas_port *port) } mutex_unlock(&port->phy_list_mutex); + if (port->is_backlink) { + struct device *parent = port->dev.parent; + + sysfs_remove_link(&port->dev.kobj, parent->bus_id); + port->is_backlink = 0; + } + transport_remove_device(dev); device_del(dev); transport_destroy_device(dev); @@ -767,6 +774,19 @@ void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy) } EXPORT_SYMBOL(sas_port_delete_phy); +void sas_port_mark_backlink(struct sas_port *port) +{ + struct device *parent = port->dev.parent->parent->parent; + + if (port->is_backlink) + return; + port->is_backlink = 1; + sysfs_create_link(&port->dev.kobj, &parent->kobj, + parent->bus_id); + +} +EXPORT_SYMBOL(sas_port_mark_backlink); + /* * SAS remote PHY attributes. */ |