iwlwifi: print warning about disconnected antennas

When we detect that not all antennas are
properly connected, we simply disable the
associated chains, but never notify the
user at all. Print out a warning so it is
obvious that happened and we know where
to start looking for related issues.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-calib.c b/drivers/net/wireless/iwlwifi/iwl-calib.c
index 7e8227773213..22fa947e8756 100644
--- a/drivers/net/wireless/iwlwifi/iwl-calib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-calib.c
@@ -846,6 +846,13 @@ void iwl_chain_noise_calibration(struct iwl_priv *priv,
                 }
         }
 
+        if (active_chains != priv->hw_params.valid_rx_ant &&
+            active_chains != priv->chain_noise_data.active_chains)
+                IWL_WARN(priv,
+                         "Detected that not all antennas are connected! "
+                         "Connected: %#x, valid: %#x.\n",
+                         active_chains, priv->hw_params.valid_rx_ant);
+
         /* Save for use within RXON, TX, SCAN commands, etc. */
         priv->chain_noise_data.active_chains = active_chains;
         IWL_DEBUG_CALIB(priv, "active_chains (bitwise) = 0x%x\n",