From d66873f5cf804bc247aa5c01cc3d5f17e5df35da Mon Sep 17 00:00:00 2001
From: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Date: Wed, 1 Jan 2014 15:32:10 +0200
Subject: [PATCH] Do not start CSA flow when CSA is not supported by the driver

Signed-hostap: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
---
 src/ap/hostapd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/ap/hostapd.c b/src/ap/hostapd.c
index 314239159..764722f96 100644
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -2367,6 +2367,12 @@ int hostapd_switch_channel(struct hostapd_data *hapd,
 			   struct csa_settings *settings)
 {
 	int ret;
+
+	if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
+		wpa_printf(MSG_INFO, "CSA is not supported");
+		return -1;
+	}
+
 	ret = hostapd_fill_csa_settings(hapd, settings);
 	if (ret)
 		return ret;