Date: Tue, 01 Apr 2025 21:01:21 +0000 From: bugzilla-noreply@freebsd.org To: wireless@FreeBSD.org Subject: [Bug 285837] rtwn with RTL8821AU and h/w checksum offload seems to treat 0 for IPv4+UDP as invalid Message-ID: <bug-285837-21060-6lkm8rQm0D@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-285837-21060@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285837 --- Comment #1 from Jessica Clarke <jrtc27@freebsd.org> --- Applying the following patch makes DHCP "just work" on this network. diff --git a/sys/dev/rtwn/rtl8812a/r12a_rx.c b/sys/dev/rtwn/rtl8812a/r12a_rx.c index 805775033fd1..b5f019cc6509 100644 --- a/sys/dev/rtwn/rtl8812a/r12a_rx.c +++ b/sys/dev/rtwn/rtl8812a/r12a_rx.c @@ -177,6 +177,15 @@ r12a_handle_c2h_report(struct rtwn_softc *sc, uint8_t *buf, int len) int r12a_check_frame_checksum(struct rtwn_softc *sc, struct mbuf *m) { + /* + * XXX: RTL8821AU seems to incorrectly handle at least UDP checksum + * fields of 0, treating them as an error. Ignore the offloaded + * checksumming result until this has been better characterised + * (including whether all-ones is correctly handled). + * + * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285837 + */ +#if 0 struct r12a_softc *rs = sc->sc_priv; struct r92c_rx_stat *stat; uint32_t rxdw1; @@ -201,6 +210,7 @@ r12a_check_frame_checksum(struct rtwn_softc *sc, struct mbuf *m) m->m_pkthdr.csum_data = 0xffff; } } +#endif return (0); } -- You are receiving this mail because: You are the assignee for the bug.home | help
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