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iwlwifi: mvm: capture the FCS in monitor mode

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This can be useful when using the device as a sniffer.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Johannes Berg
2013-10-21 12:37:53 +02:00
committed by Emmanuel Grumbach
parent bcbb8c9c7d
commit fb8b8ee10e
2 changed files with 12 additions and 2 deletions
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6
drivers/net/wireless/iwlwifi/mvm/rx.c
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@@ -300,10 +300,14 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
return 0;
}
/*
* Keep packets with CRC errors (and with overrun) for monitor mode
* (otherwise the firmware discards them) but mark them as bad.
*/
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
!(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
return 0;
rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* This will be used in several places later */