From 0e5c371aa05522ac14e91ddee0522ad855e12d02 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 23 Sep 2015 14:02:47 +0200 Subject: [PATCH] mac80211: improve __rate_control_send_low warning If there are no supported rates in the rate mask with the required flags, we warn, but it's not clear which part causes the warning. Add the relevant data to the warning to understand why it happens. Signed-off-by: Johannes Berg --- net/mac80211/rate.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c index 9857693b91ec..48d053b00858 100644 --- a/net/mac80211/rate.c +++ b/net/mac80211/rate.c @@ -305,7 +305,10 @@ static void __rate_control_send_low(struct ieee80211_hw *hw, info->control.rates[0].idx = i; break; } - WARN_ON_ONCE(i == sband->n_bitrates); + WARN_ONCE(i == sband->n_bitrates, + "no supported rates (0x%x) in rate_mask 0x%x with flags 0x%x\n", + sta ? sta->supp_rates[sband->band] : 0, + rate_mask, rate_flags); info->control.rates[0].count = (info->flags & IEEE80211_TX_CTL_NO_ACK) ?