netdev - [PATCH net] net: allow alloc_skb_with_frags() to use MAX_SKB

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Message-Id: <20250916034841.2317171-1-jbaron@akamai.com>
Date: Mon, 15 Sep 2025 23:48:41 -0400
From: Jason Baron <jbaron@...mai.com>
To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc: netdev@...r.kernel.org
Subject: [PATCH net] net: allow alloc_skb_with_frags() to use MAX_SKB_FRAGS

Currently, alloc_skb_with_frags() will only fill (MAX_SKB_FRAGS - 1)
slots. I think it should use all MAX_SKB_FRAGS slots, as callers of
alloc_skb_with_frags() will size their allocation of frags based
on MAX_SKB_FRAGS.

Signed-off-by: Jason Baron <jbaron@...mai.com>
---
 net/core/skbuff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 23b776cd9879..df942aca0617 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -6669,7 +6669,7 @@ struct sk_buff *alloc_skb_with_frags(unsigned long header_len,
 		return NULL;
 
 	while (data_len) {
-		if (nr_frags == MAX_SKB_FRAGS - 1)
+		if (nr_frags == MAX_SKB_FRAGS)
 			goto failure;
 		while (order && PAGE_ALIGN(data_len) < (PAGE_SIZE << order))
 			order--;
-- 
2.25.1