[S390] chsc: initialization fixes

This patch fixes:
 * kfree vs. free_page usage
 * structure definition for determine_css_characteristics
 * naming convention for the chsc init function
 * deregistration of crw handlers in the cleanup path
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/chsc.c

@@ -2,7 +2,7 @@
  *  drivers/s390/cio/chsc.c
  *   S/390 common I/O routines -- channel subsystem call
  *
- *    Copyright IBM Corp. 1999,2008
+ *    Copyright IBM Corp. 1999,2010
  *    Author(s): Ingo Adlung (adlung@de.ibm.com)
  *		 Cornelia Huck (cornelia.huck@de.ibm.com)
  *		 Arnd Bergmann (arndb@de.ibm.com)
@@ -813,7 +813,7 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp)
 	return ret;
 }
 
-int __init chsc_alloc_sei_area(void)
+int __init chsc_init(void)
 {
 	int ret;
 
@@ -825,14 +825,14 @@ int __init chsc_alloc_sei_area(void)
 	}
 	ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
 	if (ret)
-		kfree(sei_page);
+		free_page((unsigned long)sei_page);
 	return ret;
 }
 
-void __init chsc_free_sei_area(void)
+void __init chsc_init_cleanup(void)
 {
 	crw_unregister_handler(CRW_RSC_CSS);
-	kfree(sei_page);
+	free_page((unsigned long)sei_page);
 }
 
 int chsc_enable_facility(int operation_code)
@@ -895,7 +895,7 @@ chsc_determine_css_characteristics(void)
 		struct chsc_header response;
 		u32 reserved4;
 		u32 general_char[510];
-		u32 chsc_char[518];
+		u32 chsc_char[508];
 	} __attribute__ ((packed)) *scsc_area;
 
 	scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);

drivers/s390/cio/chsc.h

@@ -60,8 +60,8 @@ struct chsc_ssd_info {
 extern int chsc_get_ssd_info(struct subchannel_id schid,
 			     struct chsc_ssd_info *ssd);
 extern int chsc_determine_css_characteristics(void);
-extern int chsc_alloc_sei_area(void);
-extern void chsc_free_sei_area(void);
+extern int chsc_init(void);
+extern void chsc_init_cleanup(void);
 
 extern int chsc_enable_facility(int);
 struct channel_subsystem;

drivers/s390/cio/css.c

 /*
  * driver for channel subsystem
  *
- * Copyright IBM Corp. 2002, 2009
+ * Copyright IBM Corp. 2002, 2010
  *
  * Author(s): Arnd Bergmann (arndb@de.ibm.com)
  *	      Cornelia Huck (cornelia.huck@de.ibm.com)
@@ -863,14 +863,14 @@ static int __init css_bus_init(void)
 {
 	int ret, i;
 
+	ret = chsc_init();
+	if (ret)
+		return ret;
+
 	ret = chsc_determine_css_characteristics();
 	if (ret == -ENOMEM)
 		goto out;
 
-	ret = chsc_alloc_sei_area();
-	if (ret)
-		goto out;
-
 	/* Try to enable MSS. */
 	ret = chsc_enable_facility(CHSC_SDA_OC_MSS);
 	if (ret)
@@ -956,9 +956,9 @@ static int __init css_bus_init(void)
 	}
 	bus_unregister(&css_bus_type);
 out:
-	crw_unregister_handler(CRW_RSC_CSS);
-	chsc_free_sei_area();
+	crw_unregister_handler(CRW_RSC_SCH);
 	idset_free(slow_subchannel_set);
+	chsc_init_cleanup();
 	pr_alert("The CSS device driver initialization failed with "
 		 "errno=%d\n", ret);
 	return ret;
@@ -978,9 +978,9 @@ static void __init css_bus_cleanup(void)
 		device_unregister(&css->device);
 	}
 	bus_unregister(&css_bus_type);
-	crw_unregister_handler(CRW_RSC_CSS);
-	chsc_free_sei_area();
+	crw_unregister_handler(CRW_RSC_SCH);
 	idset_free(slow_subchannel_set);
+	chsc_init_cleanup();
 	isc_unregister(IO_SCH_ISC);
 }