4.9-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit c470bdc1aaf36669e04ba65faf1092b2d1c6cabe ]
Apparently, some APs are buggy enough to send a zeroed WMM IE. Don't WARN on this since this is not caused by a bug on the client's system.
This aligns the condition of the WARNING in drv_conf_tx with the validity check in ieee80211_sta_wmm_params. We will now pick the default values whenever we get a zeroed WMM IE.
This has been reported here: https://bugzilla.kernel.org/show_bug.cgi?id=199161
Fixes: f409079bb678 ("mac80211: sanity check CW_min/CW_max towards driver") Signed-off-by: Emmanuel Grumbach emmanuel.grumbach@intel.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/mac80211/mlme.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 39451c84c785..7811650e76c4 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1867,7 +1867,8 @@ static bool ieee80211_sta_wmm_params(struct ieee80211_local *local, params[ac].acm = acm; params[ac].uapsd = uapsd;
- if (params[ac].cw_min > params[ac].cw_max) { + if (params->cw_min == 0 || + params[ac].cw_min > params[ac].cw_max) { sdata_info(sdata, "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", params[ac].cw_min, params[ac].cw_max, aci);