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[PATCH 4/7] mac80211: ibss: handle cfg80211_chandef_dfs_required() error codes

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From: Luciano Coelho <luciano.coelho@xxxxxxxxx>

Error codes returned by cfg80211_chandef_dfs_required() are ignored
when trying to join an IBSS.  Fix this by printing an error and
returning.

Signed-off-by: Luciano Coelho <luciano.coelho@xxxxxxxxx>
---
 net/mac80211/ibss.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 9c84b75..b558468 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -283,6 +283,11 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 
 	err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
 					    &chandef);
+	if (err < 0) {
+		sdata_info(sdata,
+			   "Failed to join IBSS, invalid chandef\n");
+		return;
+	}
 	if (err > 0) {
 		if (!ifibss->userspace_handles_dfs) {
 			sdata_info(sdata,
-- 
1.8.5.3

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