iwlwifi: mvm: don't send fetch the TID from a non-QoS packet in TSO
Getting the TID of a packet before we know it is a QoS data
packet isn't a good idea. Delay the TID retrieval until
we know the packet is a QoS data packet.
Fixes: bb81bb68f472 ("iwlwifi: mvm: add Tx A-MSDU inside A-MPDU")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index 12a35af..172f0aa 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -715,11 +715,6 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
tcp_hdrlen(skb);
- qc = ieee80211_get_qos_ctl(hdr);
- tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
- 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 ||
@@ -730,6 +725,11 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
goto segment;
}
+ qc = ieee80211_get_qos_ctl(hdr);
+ tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
+ if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
+ return -EINVAL;
+
/*
* Do not build AMSDU for IPv6 with extension headers.
* ask stack to segment and checkum the generated MPDUs for us.