From 8acbea614a75bc2221a84f222dc32be0877861ce Mon Sep 17 00:00:00 2001 From: Paul Stewart Date: Tue, 25 Feb 2014 16:31:37 -0800 Subject: mwifiex: Track BA sequence number reset Some stations reset the sequence number for traffic-ids (TIDs) as they initiate a block-ACK session. In order to detect such behavior, mwifiex must note the starting sequence number given during the ADDBA request. If the first received sequence number after the ADDBA falls outside the receive window for this TID but after the the ADDBA starting sequence number, we can assume that this AP has reset its sequence number during the ADDBA. In this case we must adjust the input window backward to incorporate this received sequence number instead of ignoring it. Otherwise, we could fail to successfully retrieve an arbitrarily large number of downstream frames at the beginning of the block-ACK session. Signed-off-by: Paul Stewart Acked-by: Bing Zhao Signed-off-by: John W. Linville --- drivers/net/wireless/mwifiex/11n_rxreorder.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/net/wireless/mwifiex/11n_rxreorder.h') diff --git a/drivers/net/wireless/mwifiex/11n_rxreorder.h b/drivers/net/wireless/mwifiex/11n_rxreorder.h index 4064041ac852..0fc76e4a60f8 100644 --- a/drivers/net/wireless/mwifiex/11n_rxreorder.h +++ b/drivers/net/wireless/mwifiex/11n_rxreorder.h @@ -42,7 +42,8 @@ #define BA_SETUP_PACKET_OFFSET 16 enum mwifiex_rxreor_flags { - RXREOR_FORCE_NO_DROP = 1<<0, + RXREOR_FORCE_NO_DROP = 1<<0, + RXREOR_INIT_WINDOW_SHIFT = 1<<1, }; static inline void mwifiex_reset_11n_rx_seq_num(struct mwifiex_private *priv) -- cgit v1.2.1