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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>
This commit is contained in:
Denis Kenzior 2018-05-21 10:31:13 -05:00 committed by Johannes Berg
parent d4e36e5554
commit d1e23c9456
1 changed files with 9 additions and 1 deletions
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10
net/wireless/nl80211.c
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@ -8100,7 +8100,15 @@ static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
wdev_lock(wdev);
spin_lock_bh(&rdev->bss_lock);
cfg80211_bss_expire(rdev);
/*
* dump_scan will be called multiple times to break up the scan results
* into multiple messages. It is unlikely that any more bss-es will be
* expired after the first call, so only call only call this on the
* first dump_scan invocation.
*/
if (start == 0)
cfg80211_bss_expire(rdev);
cb->seq = rdev->bss_generation;