iwlwifi: mvm: check TLV flag before trying to use hotspot firmware commands

Older firmwares do not provide support for the HOT_SPOT_CMD command.
Check for the appropriate TLV flag that declares hotspot support in
the firmware to prevent a firmware assertion failure that can be
triggered from the userspace,

Cc: stable@vger.kernel.org [3.17+]
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index b62405865b25..b6d2683da3a9 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -2448,9 +2448,15 @@ static int iwl_mvm_roc(struct ieee80211_hw *hw,
 
         switch (vif->type) {
         case NL80211_IFTYPE_STATION:
-                /* Use aux roc framework (HS20) */
-                ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
-                                               vif, duration);
+                if (mvm->fw->ucode_capa.capa[0] &
+                    IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
+                        /* Use aux roc framework (HS20) */
+                        ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
+                                                       vif, duration);
+                        goto out_unlock;
+                }
+                IWL_ERR(mvm, "hotspot not supported\n");
+                ret = -EINVAL;
                 goto out_unlock;
         case NL80211_IFTYPE_P2P_DEVICE:
                 /* handle below */