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mac80211: sanity check CW_min/CW_max towards driver
There's no reason to ever set invalid CW_min/CW_max to the drivers, we should catch it in higher layers. However, the consequences of setting it wrong can be quite severe, so double-check at a low level and error out for invalid data. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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@ -631,6 +631,12 @@ static inline int drv_conf_tx(struct ieee80211_local *local,
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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if (WARN_ONCE(params->cw_min == 0 ||
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params->cw_min > params->cw_max,
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"%s: invalid CW_min/CW_max: %d/%d\n",
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sdata->name, params->cw_min, params->cw_max))
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return -EINVAL;
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trace_drv_conf_tx(local, sdata, ac, params);
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if (local->ops->conf_tx)
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ret = local->ops->conf_tx(&local->hw, &sdata->vif,
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