From fa820d696c0ac0bb3cf1b49a817899982d774d61 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Sun, 3 Apr 2016 10:15:59 +0300 Subject: [PATCH] iwlwifi: mvm: allow a debug knob for Tx A-MSDU even if rate control forbids it There is a debugfs knob to configure the maximal length of the A-MSDU. If this value is not 0 (which is the default), allow Tx A-MSDU even if the rate control disallows it. While at it, add "unlikely" to the if that limits the length of the A-MSDU based on the debugfs hook. Signed-off-by: Emmanuel Grumbach Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c index a8e5a6771375..3b645683d233 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c @@ -609,9 +609,11 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) return -EINVAL; + dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); + if (!sta->max_amsdu_len || !ieee80211_is_data_qos(hdr->frame_control) || - !mvmsta->tlc_amsdu) { + (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { num_subframes = 1; pad = 0; goto segment; @@ -642,7 +644,6 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, } max_amsdu_len = sta->max_amsdu_len; - dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); /* the Tx FIFO to which this A-MSDU will be routed */ txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; @@ -656,7 +657,7 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, max_amsdu_len = min_t(unsigned int, max_amsdu_len, mvm->shared_mem_cfg.txfifo_size[txf] - 256); - if (dbg_max_amsdu_len) + if (unlikely(dbg_max_amsdu_len)) max_amsdu_len = min_t(unsigned int, max_amsdu_len, dbg_max_amsdu_len); -- 2.20.1