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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 <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Emmanuel Grumbach 2016-04-03 10:15:59 +03:00 committed by Luca Coelho
parent aea2a5f0d8
commit fa820d696c
1 changed files with 4 additions and 3 deletions
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7
drivers/net/wireless/intel/iwlwifi/mvm/tx.c
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@ -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);