D49628.diff
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	diff --git a/sys/dev/rtwn/rtl8812a/r12a_rx.c b/sys/dev/rtwn/rtl8812a/r12a_rx.c
	--- a/sys/dev/rtwn/rtl8812a/r12a_rx.c
	+++ b/sys/dev/rtwn/rtl8812a/r12a_rx.c
	@@ -190,8 +190,16 @@
	(rxdw1 & R12A_RXDW1_IPV6) ? "IPv6" : "IP",
	(rxdw1 & R12A_RXDW1_CKSUM_ERR) ? "invalid" : "valid");

	+ /*
	+ * There seems to be a problem with UDP checksum processing
	+ * with the checksum value = 0 (ie, no checksum.)
	+ * So, don't treat it as a permament failure; just let
	+ * the IP stack take a crack at validating frames.
	+ *
	+ * See kern/285837 for more details.
	+ */
	if (rxdw1 & R12A_RXDW1_CKSUM_ERR)
	- return (-1);
	+ return (0);

	if ((rxdw1 & R12A_RXDW1_IPV6) ?
	(rs->rs_flags & R12A_RXCKSUM6_EN) :