From: Jonathan Lemon <jonathan.lemon@gmail.com>
Date: Wed, 6 Jan 2021 22:18:30 +0000 (-0800)
Subject: skbuff: simplify sock_zerocopy_put
X-Git-Tag: io_uring-worker.v3-2021-02-25~99^2~391^2~11
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d6adf1b103bfe264a494c770f27fe985ab67202c;p=linux-block.git

skbuff: simplify sock_zerocopy_put

All 'struct ubuf_info' users should have a callback defined
as of commit 0a4a060bb204 ("sock: fix zerocopy_success regression
with msg_zerocopy").

Remove the dead code path to consume_skb(), which makes
assumptions about how the structure was allocated.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index f62cae3f75d8..d88963f47f7d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1245,12 +1245,8 @@ EXPORT_SYMBOL_GPL(sock_zerocopy_callback);
 
 void sock_zerocopy_put(struct ubuf_info *uarg)
 {
-	if (uarg && refcount_dec_and_test(&uarg->refcnt)) {
-		if (uarg->callback)
-			uarg->callback(uarg, uarg->zerocopy);
-		else
-			consume_skb(skb_from_uarg(uarg));
-	}
+	if (uarg && refcount_dec_and_test(&uarg->refcnt))
+		uarg->callback(uarg, uarg->zerocopy);
 }
 EXPORT_SYMBOL_GPL(sock_zerocopy_put);