diff options
Diffstat (limited to 'drivers/s390/block')
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index 29e48b2ab712..9d0c6e1a0e66 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -48,18 +48,20 @@ struct dasd_devmap { }; /* - * dasd_servermap is used to store the server_id of all storage servers - * accessed by DASD device driver. + * dasd_server_ssid_map contains a globally unique storage server subsystem ID. + * dasd_server_ssid_list contains the list of all subsystem IDs accessed by + * the DASD device driver. */ -struct dasd_servermap { +struct dasd_server_ssid_map { struct list_head list; struct server_id { char vendor[4]; char serial[15]; } sid; + __u16 ssid; }; -static struct list_head dasd_serverlist; +static struct list_head dasd_server_ssid_list; /* * Parameter parsing functions for dasd= parameter. The syntax is: @@ -878,8 +880,9 @@ dasd_get_uid(struct ccw_device *cdev, struct dasd_uid *uid) /* * Register the given device unique identifier into devmap struct. - * In addition check if the related storage server is already contained in the - * dasd_serverlist. If server is not contained, create new entry. + * In addition check if the related storage server subsystem ID is already + * contained in the dasd_server_ssid_list. If subsystem ID is not contained, + * create new entry. * Return 0 if server was already in serverlist, * 1 if the server was added successful * <0 in case of error. @@ -888,26 +891,27 @@ int dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid) { struct dasd_devmap *devmap; - struct dasd_servermap *srv, *tmp; + struct dasd_server_ssid_map *srv, *tmp; devmap = dasd_find_busid(cdev->dev.bus_id); if (IS_ERR(devmap)) return PTR_ERR(devmap); - /* generate entry for servermap */ - srv = (struct dasd_servermap *) - kzalloc(sizeof(struct dasd_servermap), GFP_KERNEL); + /* generate entry for server_ssid_map */ + srv = (struct dasd_server_ssid_map *) + kzalloc(sizeof(struct dasd_server_ssid_map), GFP_KERNEL); if (!srv) return -ENOMEM; strncpy(srv->sid.vendor, uid->vendor, sizeof(srv->sid.vendor) - 1); strncpy(srv->sid.serial, uid->serial, sizeof(srv->sid.serial) - 1); + srv->ssid = uid->ssid; /* server is already contained ? */ spin_lock(&dasd_devmap_lock); devmap->uid = *uid; - list_for_each_entry(tmp, &dasd_serverlist, list) { + list_for_each_entry(tmp, &dasd_server_ssid_list, list) { if (!memcmp(&srv->sid, &tmp->sid, - sizeof(struct dasd_servermap))) { + sizeof(struct dasd_server_ssid_map))) { kfree(srv); srv = NULL; break; @@ -916,7 +920,7 @@ dasd_set_uid(struct ccw_device *cdev, struct dasd_uid *uid) /* add servermap to serverlist */ if (srv) - list_add(&srv->list, &dasd_serverlist); + list_add(&srv->list, &dasd_server_ssid_list); spin_unlock(&dasd_devmap_lock); return (srv ? 1 : 0); @@ -987,7 +991,7 @@ dasd_devmap_init(void) INIT_LIST_HEAD(&dasd_hashlists[i]); /* Initialize servermap structure. */ - INIT_LIST_HEAD(&dasd_serverlist); + INIT_LIST_HEAD(&dasd_server_ssid_list); return 0; } |