Workaround kernel BUG_ON panic caused by unexpected duplicate packets. (87b016cb) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/net/wireless/ipw2200.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -7696,7 +7696,6 @@ static inline int is_network_packet(struct ipw_priv *priv,
		static inline int is_duplicate_packet(struct ipw_priv *priv,
		struct ieee80211_hdr_4addr *header)
		{
		u16 fc = le16_to_cpu(header->frame_ctl);
		u16 sc = le16_to_cpu(header->seq_ctl);
		u16 seq = WLAN_GET_SEQ_SEQ(sc);
		u16 frag = WLAN_GET_SEQ_FRAG(sc);
		@@ -7760,7 +7759,10 @@ static inline int is_duplicate_packet(struct ipw_priv *priv,
		return 0;

		drop:
		BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
		/* Comment this line now since we observed the card receives
		* duplicate packets but the FCTL_RETRY bit is not set in the
		* IBSS mode with fragmentation enabled.
		BUG_ON(!(le16_to_cpu(header->frame_ctl) & IEEE80211_FCTL_RETRY)); */
		return 1;
		}