wifi: iwlwifi: mvm: rfi: disable RFI feature

This feature depends on a platform bugfix. Until we have a
mechanism that can verify a platform has the required bugfix,
disable RFI.

Fixes: ef3ed33d ("wifi: iwlwifi: bump FW API to 77 for AX devices")
Reported-by: Jeff Chua <jeff.chua.linux@gmail.com>
Link: https://lore.kernel.org/linux-wireless/CAAJw_ZvZdFpw9W2Hisc9c2BAFbYAnQuaFFaFG6N7qPUP2fOL_w@mail.gmail.com/Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/fw.c

@@ -1727,8 +1727,7 @@ int iwl_mvm_up(struct iwl_mvm *mvm)
 	iwl_mvm_tas_init(mvm);
 	iwl_mvm_leds_sync(mvm);
 
-	if (fw_has_capa(&mvm->fw->ucode_capa,
-			IWL_UCODE_TLV_CAPA_RFIM_SUPPORT)) {
+	if (iwl_rfi_supported(mvm)) {
 		if (iwl_mvm_eval_dsm_rfi(mvm) == DSM_VALUE_RFI_ENABLE)
 			iwl_rfi_send_config_cmd(mvm, NULL);
 	}

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -2347,6 +2347,7 @@ int iwl_mvm_mld_update_sta_keys(struct iwl_mvm *mvm,
 				u32 old_sta_mask,
 				u32 new_sta_mask);
 
+bool iwl_rfi_supported(struct iwl_mvm *mvm);
 int iwl_rfi_send_config_cmd(struct iwl_mvm *mvm,
 			    struct iwl_rfi_lut_entry *rfi_table);
 struct iwl_rfi_freq_table_resp_cmd *iwl_rfi_get_freq_table(struct iwl_mvm *mvm);

drivers/net/wireless/intel/iwlwifi/mvm/rfi.c

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
- * Copyright (C) 2020 - 2021 Intel Corporation
+ * Copyright (C) 2020 - 2022 Intel Corporation
  */
 
 #include "mvm.h"
@@ -70,6 +70,16 @@ static const struct iwl_rfi_lut_entry iwl_rfi_table[IWL_RFI_LUT_SIZE] = {
 		PHY_BAND_6, PHY_BAND_6,}},
 };
 
+bool iwl_rfi_supported(struct iwl_mvm *mvm)
+{
+	/* The feature depends on a platform bugfix, so for now
+	 * it's always disabled.
+	 * When the platform support detection is implemented we should
+	 * check FW TLV and platform support instead.
+	 */
+	return false;
+}
+
 int iwl_rfi_send_config_cmd(struct iwl_mvm *mvm, struct iwl_rfi_lut_entry *rfi_table)
 {
 	int ret;
@@ -81,7 +91,7 @@ int iwl_rfi_send_config_cmd(struct iwl_mvm *mvm, struct iwl_rfi_lut_entry *rfi_t
 		.len[0] = sizeof(cmd),
 	};
 
-	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_RFIM_SUPPORT))
+	if (!iwl_rfi_supported(mvm))
 		return -EOPNOTSUPP;
 
 	lockdep_assert_held(&mvm->mutex);
@@ -113,7 +123,7 @@ struct iwl_rfi_freq_table_resp_cmd *iwl_rfi_get_freq_table(struct iwl_mvm *mvm)
 		.flags = CMD_WANT_SKB,
 	};
 
-	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_RFIM_SUPPORT))
+	if (!iwl_rfi_supported(mvm))
 		return ERR_PTR(-EOPNOTSUPP);
 
 	mutex_lock(&mvm->mutex);