mtd/drivers/mtd mtdpart.c,1.35,1.36

[David Woodhouse]

Update of /home/cvs/mtd/drivers/mtd
In directory phoenix.infradead.org:/tmp/cvs-serv24902/drivers/mtd

Modified Files:
	mtdpart.c 
Log Message:
New partition probing stuff

Index: mtdpart.c
===================================================================
RCS file: /home/cvs/mtd/drivers/mtd/mtdpart.c,v
retrieving revision 1.35
retrieving revision 1.36
diff -u -r1.35 -r1.36
--- mtdpart.c	14 May 2003 22:26:27 -0000	1.35
+++ mtdpart.c	16 May 2003 16:06:44 -0000	1.36
@@ -479,6 +479,75 @@
 EXPORT_SYMBOL(add_mtd_partitions);
 EXPORT_SYMBOL(del_mtd_partitions);
 
+static spinlock_t part_parser_lock = SPIN_LOCK_UNLOCKED;
+static LIST_HEAD(part_parsers);
+
+struct mtd_part_parser *get_partition_parser(const char *name)
+{
+	struct list_head *this;
+	void *ret = NULL;
+	spin_lock(&part_parser_lock);
+
+	list_for_each(this, &part_parsers) {
+		struct mtd_part_parser *p = list_entry(this, struct mtd_part_parser, list);
+
+		if (!strcmp(p->name, name) && try_module_get(p->owner)) {
+			ret = p;
+			break;
+		}
+	}
+	spin_unlock(&part_parser_lock);
+
+	return ret;
+}
+
+int register_mtd_parser(struct mtd_part_parser *p)
+{
+	spin_lock(&part_parser_lock);
+	list_add(&p->list, &part_parsers);
+	spin_unlock(&part_parser_lock);
+
+	return 0;
+}
+
+int deregister_mtd_parser(struct mtd_part_parser *p)
+{
+	spin_lock(&part_parser_lock);
+	list_del(&p->list);
+	spin_unlock(&part_parser_lock);
+	return 0;
+}
+
+int parse_mtd_partitions(struct mtd_info *master, const char **types, 
+			 struct mtd_partition **pparts, unsigned long origin)
+{
+	struct mtd_part_parser *parser;
+	int ret = 0;
+		
+	for ( ; ret <= 0 && *types; types++) {
+		parser = get_partition_parser(*types);
+#ifdef CONFIG_KMOD
+		if (!parser && !request_module(*types))
+				parser = get_partition_parser(*types);
+#endif
+		if (!parser) {
+			printk(KERN_NOTICE "%s partition parsing not available\n",
+			       *types);
+			continue;
+		}
+		ret = (*parser->parse_fn)(master, pparts, origin);
+		if (ret > 0) {
+			printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n", 
+			       ret, parser->name, master->name);
+		}
+		put_partition_parser(parser);
+	}
+	return ret;
+}
+
+EXPORT_SYMBOL_GPL(parse_mtd_partitions);
+EXPORT_SYMBOL_GPL(register_mtd_parser);
+EXPORT_SYMBOL_GPL(deregister_mtd_parser);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Nicolas Pitre <nico at cam.org>");