[S390] cio: Reorganize initialization.

- Localize more of the init calls in init_channel_subsystem().
- Print a warning if init_channel_subsystem() failed.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

3 files changed, 24 insertions, 7 deletions

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index b38dc2478541..597c0c76a2ad 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -990,8 +990,7 @@ out:
         return ret;
 }
 
-static int __init
-chsc_alloc_sei_area(void)
+int __init chsc_alloc_sei_area(void)
 {
         sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
         if (!sei_page)
@@ -1000,6 +999,11 @@ chsc_alloc_sei_area(void)
         return (sei_page ? 0 : -ENOMEM);
 }
 
+void __init chsc_free_sei_area(void)
+{
+        kfree(sei_page);
+}
+
 int __init
 chsc_enable_facility(int operation_code)
 {
@@ -1051,8 +1055,6 @@ chsc_enable_facility(int operation_code)
         return ret;
 }
 
-subsys_initcall(chsc_alloc_sei_area);
-
 struct css_general_char css_general_characteristics;
 struct css_chsc_char css_chsc_characteristics;
 
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 2ad81d11cf7b..d1f5db1e69b9 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -79,6 +79,8 @@ extern int chsc_get_ssd_info(struct subchannel_id schid,
                              struct chsc_ssd_info *ssd);
 extern int chsc_determine_css_characteristics(void);
 extern int css_characteristics_avail;
+extern int chsc_alloc_sei_area(void);
+extern void chsc_free_sei_area(void);
 
 extern int chsc_enable_facility(int);
 struct channel_subsystem;
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index ac5ceb933896..1c27a5a06b49 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -377,8 +377,6 @@ static int __init slow_subchannel_init(void)
         return 0;
 }
 
-subsys_initcall(slow_subchannel_init);
-
 static void css_slow_path_func(struct work_struct *unused)
 {
         struct subchannel_id schid;
@@ -641,9 +639,20 @@ init_channel_subsystem (void)
 {
         int ret, i;
 
-        if (chsc_determine_css_characteristics() == 0)
+        ret = chsc_determine_css_characteristics();
+        if (ret == -ENOMEM)
+                goto out; /* No need to continue. */
+        if (ret == 0)
                 css_characteristics_avail = 1;
 
+        ret = chsc_alloc_sei_area();
+        if (ret)
+                goto out;
+
+        ret = slow_subchannel_init();
+        if (ret)
+                goto out;
+
         if ((ret = bus_register(&css_bus_type)))
                 goto out;
 
@@ -709,6 +718,10 @@ out_unregister:
 out_bus:
         bus_unregister(&css_bus_type);
 out:
+        chsc_free_sei_area();
+        kfree(slow_subchannel_set);
+        printk(KERN_WARNING"cio: failed to initialize css driver (%d)!\n",
+               ret);
         return ret;
 }