Subject: [RFC net-next 03/13] net: page_pool: factor out uninit

From: Jakub Kicinski <[email-masked]>
Date: Wed, 16 Aug 2023 16:42:52 -0700

We'll soon need a fuller unwind path in page_pool_create()
so create the inverse of page_pool_init().

Signed-off-by: Jakub Kicinski <[email-masked]>
---
 net/core/page_pool.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 2c14445a353a..8e71e116224d 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -238,6 +238,18 @@ static int page_pool_init(struct page_pool *pool,
 	return 0;
 }
 
+static void page_pool_uninit(struct page_pool *pool)
+{
+	ptr_ring_cleanup(&pool->ring, NULL);
+
+	if (pool->p.flags & PP_FLAG_DMA_MAP)
+		put_device(pool->p.dev);
+
+#ifdef CONFIG_PAGE_POOL_STATS
+	free_percpu(pool->recycle_stats);
+#endif
+}
+
 /**
  * page_pool_create() - create a page pool.
  * @params: parameters, see struct page_pool_params
@@ -806,14 +818,7 @@ static void page_pool_free(struct page_pool *pool)
 	if (pool->disconnect)
 		pool->disconnect(pool);
 
-	ptr_ring_cleanup(&pool->ring, NULL);
-
-	if (pool->p.flags & PP_FLAG_DMA_MAP)
-		put_device(pool->p.dev);
-
-#ifdef CONFIG_PAGE_POOL_STATS
-	free_percpu(pool->recycle_stats);
-#endif
+	page_pool_uninit(pool);
 	kfree(pool);
 }
 
-- 
2.41.0