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-rw-r--r--drivers/s390/block/dasd_devmap.c32
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;
}