From: Denis Kenzior Date: Mon, 21 May 2018 15:31:13 +0000 (-0500) Subject: nl80211: Optimize cfg80211_bss_expire invocations X-Git-Tag: v4.19~872^2~161^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d1e23c9456b2881b71732594f4cdb52d78aedecb;p=platform%2Fkernel%2Flinux-rpi.git 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 Signed-off-by: Johannes Berg --- diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index a3dcea2f..451f12e 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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;