From 1101524fff9381c5f0f28a205c7dd9f5218caec1 Mon Sep 17 00:00:00 2001
From: Matt Chen <matt.chen@intel.com>
Date: Fri, 23 Jun 2017 17:50:18 +0800
Subject: [PATCH 37/68] iwlwifi: mvm: don't send CTDP commands via debugfs if
 not supported
References: FATE#322675
Patch-mainline: v4.14-rc1
Git-commit: 0bef1b83d35566e9bc757469c823c126862a65d3

Fix this issue if it is not supported by the firmware.

Fixes: 00f481bd895a ("iwlwifi: mvm: add ctdp operations to debugfs")
Signed-off-by: Matt Chen <matt.chen@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 0b5cae54b86b..ceb486610a56 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -82,6 +82,9 @@ static ssize_t iwl_dbgfs_ctdp_budget_read(struct file *file,
 	char buf[16];
 	int pos, budget;
 
+	if (!iwl_mvm_is_ctdp_supported(mvm))
+		return -EOPNOTSUPP;
+
 	if (!iwl_mvm_firmware_running(mvm) ||
 	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
 		return -EIO;
@@ -103,6 +106,9 @@ static ssize_t iwl_dbgfs_stop_ctdp_write(struct iwl_mvm *mvm, char *buf,
 {
 	int ret;
 
+	if (!iwl_mvm_is_ctdp_supported(mvm))
+		return -EOPNOTSUPP;
+
 	if (!iwl_mvm_firmware_running(mvm) ||
 	    mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
 		return -EIO;
-- 
2.12.3