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iwlwifi: mvm: read IWL_RX_MPDU_PHY_SHORT_PREAMBLE only for CCK

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Due to a general shortage of RX API bits, the firmware is going
to reuse this bit on non-CCK frames to mean something else. Use
it only on CCK frames to prepare for that change.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2018-10-29 09:44:03 +01:00 • committed by Luca Coelho
commit 486af86332
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
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@ -1408,7 +1408,8 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* set the preamble flag if appropriate */
if (phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
if (rate_n_flags & RATE_MCS_CCK_MSK &&
phy_info & IWL_RX_MPDU_PHY_SHORT_PREAMBLE)
rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
if (likely(!(phy_info & IWL_RX_MPDU_PHY_TSF_OVERLOAD))) {