diff options
| author | Ilan Peer <ilan.peer@intel.com> | 2017-08-08 14:56:58 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2017-08-18 16:16:11 +0300 |
| commit | f5d8f50f271d1f80c2afd7eada1c91a863c87a06 (patch) | |
| tree | b78906b658b276487fe2968b1abc794bb9512229 /drivers/net/wireless/intel | |
| parent | 5f5537ac3f0f7bd527d332aa166a009be833dfae (diff) | |
| download | linux-f5d8f50f271d1f80c2afd7eada1c91a863c87a06.tar.xz | |
iwlwifi: mvm: Fix channel switch in case of count <= 1
The code did not consider the case that the channel switch counter
is <= 1, which would result with an inaccurate calculation of the
time event apply time.
As the specification states that in case of counter == 0 the switch
occurs at any time after the reception the frame, and for counter == 1
the switch would happens before the next TBTT, schedule the time
event immediately.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index 01143c491e53..cfabe302c9c7 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -3875,11 +3875,16 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw, /* Schedule the time event to a bit before beacon 1, * to make sure we're in the new channel when the - * GO/AP arrives. + * GO/AP arrives. In case count <= 1 immediately schedule the + * TE (this might result with some packet loss or connection + * loss). */ - apply_time = chsw->device_timestamp + - ((vif->bss_conf.beacon_int * (chsw->count - 1) - - IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024); + if (chsw->count <= 1) + apply_time = 0; + else + apply_time = chsw->device_timestamp + + ((vif->bss_conf.beacon_int * (chsw->count - 1) - + IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024); if (chsw->block_tx) iwl_mvm_csa_client_absent(mvm, vif); |