greybus: connection: add name field

Add a name field to connections that can be used in log messages.

A connection always belongs to a host-device (bus) and can be uniquely
identified by its host-device cport id, but include remote interface and
cport id nonetheless on the following format:

	<hd_cport_id>/<intf_id>:<cport_id>

The remote interface and cport id will be zero for static connections.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/connection.c b/drivers/staging/greybus/connection.c
index 3f2fe01..65d72b8 100644 (file)
--- a/drivers/staging/greybus/connection.c
+++ b/drivers/staging/greybus/connection.c
@@ -95,6 +95,21 @@ int svc_update_connection(struct gb_interface *intf,
        return 0;
 }
 
+static void gb_connection_init_name(struct gb_connection *connection)
+{
+       u16 hd_cport_id = connection->hd_cport_id;
+       u16 cport_id = 0;
+       u8 intf_id = 0;
+
+       if (connection->intf) {
+               intf_id = connection->intf->interface_id;
+               cport_id = connection->intf_cport_id;
+       }
+
+       snprintf(connection->name, sizeof(connection->name),
+                       "%hu/%hhu:%hu", hd_cport_id, intf_id, cport_id);
+}
+
 /*
  * gb_connection_create() - create a Greybus connection
  * @hd:                        host device of the connection
@@ -179,6 +194,8 @@ gb_connection_create(struct gb_host_device *hd, int hd_cport_id,
 
        kref_init(&connection->kref);
 
+       gb_connection_init_name(connection);
+
        spin_lock_irq(&gb_connections_lock);
        list_add(&connection->hd_links, &hd->connections);
 

diff --git a/drivers/staging/greybus/connection.h b/drivers/staging/greybus/connection.h
index 446ffe1..028f278 100644 (file)
--- a/drivers/staging/greybus/connection.h
+++ b/drivers/staging/greybus/connection.h
@@ -43,6 +43,7 @@ struct gb_connection {
        enum gb_connection_state        state;
        struct list_head                operations;
 
+       char                            name[16];
        struct workqueue_struct         *wq;
 
        atomic_t                        op_cycle;