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Miller" , Eric Dumazet , Paolo Abeni , Willem de Bruijn Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13.0 The PSP spec requires the implementations accept 0 checksum in psp-udp header. Let's take advantage of that to trim netdevsim's psp code down. psp_dev_encapsulate() already sets uh->check to 0. Assisted-by: Claude:claude-opus-4.6 Signed-off-by: Daniel Zahka --- drivers/net/netdevsim/psp.c | 32 -------------------------------- 1 file changed, 32 deletions(-) diff --git a/drivers/net/netdevsim/psp.c b/drivers/net/netdevsim/psp.c index 5073bda60883..75740e2a731f 100644 --- a/drivers/net/netdevsim/psp.c +++ b/drivers/net/netdevsim/psp.c @@ -1,8 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 -#include #include -#include #include #include @@ -81,36 +79,6 @@ nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns, skb->len - skb_inner_transport_offset(skb)); u64_stats_update_end(&ns->psp.syncp); } else { - struct ipv6hdr *ip6h __maybe_unused; - struct iphdr *iph; - struct udphdr *uh; - __wsum csum; - - /* Do not decapsulate. Receive the skb with the udp and psp - * headers still there as if this is a normal udp packet. - * psp_dev_encapsulate() sets udp checksum to 0, so we need to - * provide a valid checksum here, so the skb isn't dropped. - */ - uh = udp_hdr(skb); - csum = skb_checksum(skb, skb_transport_offset(skb), - ntohs(uh->len), 0); - - switch (skb->protocol) { - case htons(ETH_P_IP): - iph = ip_hdr(skb); - uh->check = udp_v4_check(ntohs(uh->len), iph->saddr, - iph->daddr, csum); - break; -#if IS_ENABLED(CONFIG_IPV6) - case htons(ETH_P_IPV6): - ip6h = ipv6_hdr(skb); - uh->check = udp_v6_check(ntohs(uh->len), &ip6h->saddr, - &ip6h->daddr, csum); - break; -#endif - } - - uh->check = uh->check ?: CSUM_MANGLED_0; skb->ip_summed = CHECKSUM_NONE; } -- 2.52.0