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nl80211: Optimize cfg80211_bss_expire invocations
Only invoke cfg80211_bss_expire on the first nl80211_dump_scan invocation to avoid (likely) redundant processing. Signed-off-by: Denis Kenzior <denkenz@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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@ -8100,7 +8100,15 @@ static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
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wdev_lock(wdev);
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spin_lock_bh(&rdev->bss_lock);
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cfg80211_bss_expire(rdev);
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/*
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* dump_scan will be called multiple times to break up the scan results
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* into multiple messages. It is unlikely that any more bss-es will be
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* expired after the first call, so only call only call this on the
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* first dump_scan invocation.
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*/
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if (start == 0)
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cfg80211_bss_expire(rdev);
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cb->seq = rdev->bss_generation;
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