mac80211: don't warn about CW params when not using them

[ Upstream commit d2b3fe42bc629c2d4002f652b3abdfb2e72991c7 ]

ieee80211_set_wmm_default() normally sets up the initial CW min/max for
each queue, except that it skips doing this if the driver doesn't
support ->conf_tx. We still end up calling drv_conf_tx() in some cases
(e.g., ieee80211_reconfig()), which also still won't do anything
useful...except it complains here about the invalid CW parameters.

Let's just skip the WARN if we weren't going to do anything useful with
the parameters.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20190718015712.197499-1-briannorris@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index bb886e7db47f1dcf409a4746d7ee47be8c679462..f783d1377d9a8205eea3218354083debc3c5ecdb 100644 (file)
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -169,11 +169,16 @@ int drv_conf_tx(struct ieee80211_local *local,
        if (!check_sdata_in_driver(sdata))
                return -EIO;
 
-       if (WARN_ONCE(params->cw_min == 0 ||
-                     params->cw_min > params->cw_max,
-                     "%s: invalid CW_min/CW_max: %d/%d\n",
-                     sdata->name, params->cw_min, params->cw_max))
+       if (params->cw_min == 0 || params->cw_min > params->cw_max) {
+               /*
+                * If we can't configure hardware anyway, don't warn. We may
+                * never have initialized the CW parameters.
+                */
+               WARN_ONCE(local->ops->conf_tx,
+                         "%s: invalid CW_min/CW_max: %d/%d\n",
+                         sdata->name, params->cw_min, params->cw_max);
                return -EINVAL;
+       }
 
        trace_drv_conf_tx(local, sdata, ac, params);
        if (local->ops->conf_tx)