diff options
author | Avri Altman <avri.altman@intel.com> | 2013-08-01 04:19:27 (GMT) |
---|---|---|
committer | Johannes Berg <johannes.berg@intel.com> | 2013-08-06 08:32:38 (GMT) |
commit | 17dbe56445328fcc275f2ca318c06e55d7d403df (patch) | |
tree | 8b5b8a4e2665828a7cb281cebb671716744cc925 /drivers/net/wireless/iwlwifi/mvm/rx.c | |
parent | 977342bc3d672f6d11386c19ccee3f8b2400bcde (diff) | |
download | linux-fsl-qoriq-17dbe56445328fcc275f2ca318c06e55d7d403df.tar.xz |
iwlwifi: mvm: fix signal reporting for < 3 antennas
When fewer than three antennas are connected (as is
always the case for the current devices), the signal
strength reporting was wrong; fix it.
Signed-off-by: Avri Altman <avri.altman@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/rx.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/mvm/rx.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c index 5057fd3..ee6547d 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rx.c +++ b/drivers/net/wireless/iwlwifi/mvm/rx.c @@ -167,6 +167,9 @@ static void iwl_mvm_calc_rssi(struct iwl_mvm *mvm, /* * iwl_mvm_get_signal_strength - use new rx PHY INFO API + * values are reported by the fw as positive values - need to negate + * to obtain their dBM. Account for missing antennas by replacing 0 + * values by -256dBm: practically 0 power and a non-feasible 8 bit value. */ static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, struct iwl_rx_phy_info *phy_info, @@ -177,12 +180,15 @@ static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm, val = le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]); - energy_a = -((val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> - IWL_RX_INFO_ENERGY_ANT_A_POS); - energy_b = -((val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> - IWL_RX_INFO_ENERGY_ANT_B_POS); - energy_c = -((val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> - IWL_RX_INFO_ENERGY_ANT_C_POS); + energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >> + IWL_RX_INFO_ENERGY_ANT_A_POS; + energy_a = energy_a ? -energy_a : -256; + energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >> + IWL_RX_INFO_ENERGY_ANT_B_POS; + energy_b = energy_b ? -energy_b : -256; + energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >> + IWL_RX_INFO_ENERGY_ANT_C_POS; + energy_c = energy_c ? -energy_c : -256; max_energy = max(energy_a, energy_b); max_energy = max(max_energy, energy_c); |