wifi: nl80211: call kfree without a NULL check

JIRA: https://issues.redhat.com/browse/RHEL-114889

commit 249e144
Author: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Date:   Mon Oct 20 10:57:45 2025 +0300

    wifi: nl80211: call kfree without a NULL check
    
    Coverity is unhappy because we may leak old_radio_rts_threshold. Since
    this pointer is only valid in the context of the function and kfree is
    NULL pointer safe, don't check and just call kfree.
    Note that somehow, we were checking old_rts_threshold to free
    old_radio_rts_threshold which is a bit odd.
    
    Fixes: 2646379 ("wifi: cfg80211: Add Support to Set RTS Threshold for each Radio")
    Reviewed-by: Johannes Berg <johannes.berg@intel.com>
    Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Link: https://patch.msgid.link/20251020075745.44168-1-emmanuel.grumbach@intel.com
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>

Author: jtornosm

net/wireless/nl80211.c

@@ -4017,8 +4017,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 			rdev->wiphy.txq_quantum = old_txq_quantum;
 		}
 
-		if (old_rts_threshold)
-			kfree(old_radio_rts_threshold);
+		kfree(old_radio_rts_threshold);
 		return result;
 	}