From: Helmut Schaa Date: Fri, 5 Aug 2011 09:46:19 +0000 (+0200) Subject: mac80211: Don't use a buf_size=0 in ADDBA requests X-Git-Tag: v3.2-rc1~129^2~254^2~371 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=39e68712d75700ec09770c7ad9e8e4abc65db7c6;p=platform%2Fkernel%2Flinux-3.10.git mac80211: Don't use a buf_size=0 in ADDBA requests According to 802.11-2007, 7.3.1.14 it is compliant to use a buf_size of 0 in ADDBA requests. But some devices (AVM Fritz Stick N) arn't able to handle that correctly and will reply with an ADDBA reponse with a buf_size of 0 which in turn will disallow BA sessions for these devices. To work around this problem, initialize hw.max_tx_aggregation_subframes to the maximum AMPDU buffer size 0x40. Using 0 as default for the bufsize was introduced in commit 5dd36bc933e8be84f8369ac64505a2938f9ce036 (mac80211: allow advertising correct maximum aggregate size). Signed-off-by: Helmut Schaa Acked-by: Johannes Berg Signed-off-by: John W. Linville --- diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 866f269..104fdd9 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -608,6 +608,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, local->hw.max_rates = 1; local->hw.max_report_rates = 0; local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; + local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; local->user_power_level = -1;