[S390] cio: idset use actual number of ssids

The functions idset_sch_new and for_each_subchannel_staged
use different values for the number of subchannel sets. Make
it consistent by changing idset_sch_new to also use the actual
number of subchannel sets.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index b43f769..5e217bb 100644 (file)
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -32,7 +32,7 @@
 
 int css_init_done = 0;
 static int need_reprobe = 0;
-static int max_ssid = 0;
+int max_ssid;
 
 struct channel_subsystem *channel_subsystems[__MAX_CSSID + 1];
 
@@ -879,6 +879,18 @@ static int __init css_bus_init(void)
        if (ret)
                goto out;
 
+       /* Try to enable MSS. */
+       ret = chsc_enable_facility(CHSC_SDA_OC_MSS);
+       switch (ret) {
+       case 0: /* Success. */
+               max_ssid = __MAX_SSID;
+               break;
+       case -ENOMEM:
+               goto out;
+       default:
+               max_ssid = 0;
+       }
+
        ret = slow_subchannel_init();
        if (ret)
                goto out;
@@ -890,17 +902,6 @@ static int __init css_bus_init(void)
        if ((ret = bus_register(&css_bus_type)))
                goto out;
 
-       /* Try to enable MSS. */
-       ret = chsc_enable_facility(CHSC_SDA_OC_MSS);
-       switch (ret) {
-       case 0: /* Success. */
-               max_ssid = __MAX_SSID;
-               break;
-       case -ENOMEM:
-               goto out_bus;
-       default:
-               max_ssid = 0;
-       }
        /* Setup css structure. */
        for (i = 0; i <= __MAX_CSSID; i++) {
                struct channel_subsystem *css;
@@ -966,7 +967,6 @@ out_unregister:
                                           &dev_attr_cm_enable);
                device_unregister(&css->device);
        }
-out_bus:
        bus_unregister(&css_bus_type);
 out:
        crw_unregister_handler(CRW_RSC_CSS);

diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 54acdaa..68d6b0b 100644 (file)
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -111,6 +111,7 @@ extern void css_sch_device_unregister(struct subchannel *);
 extern int css_probe_device(struct subchannel_id);
 extern struct subchannel *get_subchannel_by_schid(struct subchannel_id);
 extern int css_init_done;
+extern int max_ssid;
 int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *),
                               int (*fn_unknown)(struct subchannel_id,
                               void *), void *data);

diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
index 77e42cb..5c88faf 100644 (file)
--- a/drivers/s390/cio/idset.c
+++ b/drivers/s390/cio/idset.c
@@ -78,7 +78,7 @@ static inline int idset_get_first(struct idset *set, int *ssid, int *id)
 
 struct idset *idset_sch_new(void)
 {
-       return idset_new(__MAX_SSID + 1, __MAX_SUBCHANNEL + 1);
+       return idset_new(max_ssid + 1, __MAX_SUBCHANNEL + 1);
 }
 
 void idset_sch_add(struct idset *set, struct subchannel_id schid)