Change map_io success return code from 0 to 1 [=> bio successfully remapped]
--- diff/drivers/md/dm-mpath.c	2004-10-29 15:38:10.000000000 +0100
+++ source/drivers/md/dm-mpath.c	2004-10-29 15:38:17.000000000 +0100
@@ -208,12 +208,9 @@
 	return 0;
 }
 
-static struct path *get_current_path(struct multipath *m)
+static struct path *__get_current_path(struct multipath *m)
 {
 	struct path *path;
-	unsigned long flags;
-
-	spin_lock_irqsave(&m->lock, flags);
 
 	/* Do we need to select a new path? */
 	if (!m->current_path || (m->current_count && --m->current_count == 0))
@@ -221,19 +218,22 @@
 
 	path = m->current_path;
 
-	spin_unlock_irqrestore(&m->lock, flags);
-
 	return path;
 }
 
 static int map_io(struct multipath *m, struct bio *bio, struct mpath_io *mpio)
 {
-	mpio->path = get_current_path(m);
+	unsigned long flags;
+
+	spin_lock_irqsave(&m->lock, flags);
+	mpio->path = __get_current_path(m);
+	spin_unlock_irqrestore(&m->lock, flags);
+
 	if (!mpio->path)
 		return -EIO;
 
 	bio->bi_bdev = mpio->path->dev->bdev;
-	return 0;
+	return 1;
 }
 
 static void dispatch_failed_ios(void *data)
@@ -538,13 +538,12 @@
 
 	bio->bi_rw |= (1 << BIO_RW_FAILFAST);
 	r = map_io(m, bio, mpio);
-	if (r) {
+	if (r < 0)
 		mempool_free(mpio, m->mpio_pool);
-		return r;
-	}
+	else
+		map_context->ptr = mpio;
 
-	map_context->ptr = mpio;
-	return 1;
+	return r;
 }
 
 static int fail_path(struct path *path)
@@ -701,9 +700,9 @@
 		/* remap */
 		dm_bio_restore(&mpio->details, bio);
 		r = map_io(m, bio, mpio);
-		if (r)
+		if (r < 0)
 			/* no paths left */
-			return -EIO;
+			return r;
 
 		/* queue for the daemon to resubmit */
 		spin_lock(&m->lock);