diff --git a/mm/readahead.c b/mm/readahead.c
index 12d8707c36e0..73fcc8671261 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -376,10 +376,10 @@ static int try_context_readahead(struct address_space *mapping,
 	size = count_history_pages(mapping, ra, offset, max);
 
 	/*
-	 * no history pages:
+	 * not enough history pages:
 	 * it could be a random read
 	 */
-	if (!size)
+	if (size <= req_size)
 		return 0;
 
 	/*
@@ -390,8 +390,8 @@ static int try_context_readahead(struct address_space *mapping,
 		size *= 2;
 
 	ra->start = offset;
-	ra->size = get_init_ra_size(size + req_size, max);
-	ra->async_size = ra->size;
+	ra->size = min(size + req_size, max);
+	ra->async_size = 1;
 
 	return 1;
 }