| Message ID | 1636560388-24955-1-git-send-email-quic_periyasa@quicinc.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 4c375743c5fe1ef84d1dd7269dd12585957f403e |
| Delegated to: | Kalle Valo |
| Headers | show |
| Series | ath11k: avoid unnecessary BH disable lock in STA kickout event | expand |
Karthikeyan Periyasamy <quic_periyasa@quicinc.com> wrote: > In STA kickout event processing, the peer object is protected > under spin lock BH. Release this lock after picking up the vdev_id > from the peer object instead after ieee80211_report_low_ack(). > This will minimize the lock hold period which will improve > performance since base_lock is used across the data path. > This was found in code review. > > Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.5.0.1-00729-QCAHKSWPL_SILICONZ-3 v2 > > Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com> > Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Patch applied to ath-next branch of ath.git, thanks. 4c375743c5fe ath11k: avoid unnecessary BH disable lock in STA kickout event
diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c index 5ae2ef4..60de539 100644 --- a/drivers/net/wireless/ath/ath11k/wmi.c +++ b/drivers/net/wireless/ath/ath11k/wmi.c @@ -6398,6 +6398,7 @@ static void ath11k_peer_sta_kickout_event(struct ath11k_base *ab, struct sk_buff struct ieee80211_sta *sta; struct ath11k_peer *peer; struct ath11k *ar; + u32 vdev_id; if (ath11k_pull_peer_sta_kickout_ev(ab, skb, &arg) != 0) { ath11k_warn(ab, "failed to extract peer sta kickout event"); @@ -6413,10 +6414,15 @@ static void ath11k_peer_sta_kickout_event(struct ath11k_base *ab, struct sk_buff if (!peer) { ath11k_warn(ab, "peer not found %pM\n", arg.mac_addr); + spin_unlock_bh(&ab->base_lock); goto exit; } - ar = ath11k_mac_get_ar_by_vdev_id(ab, peer->vdev_id); + vdev_id = peer->vdev_id; + + spin_unlock_bh(&ab->base_lock); + + ar = ath11k_mac_get_ar_by_vdev_id(ab, vdev_id); if (!ar) { ath11k_warn(ab, "invalid vdev id in peer sta kickout ev %d", peer->vdev_id); @@ -6437,7 +6443,6 @@ static void ath11k_peer_sta_kickout_event(struct ath11k_base *ab, struct sk_buff ieee80211_report_low_ack(sta, 10); exit: - spin_unlock_bh(&ab->base_lock); rcu_read_unlock(); }
In STA kickout event processing, the peer object is protected under spin lock BH. Release this lock after picking up the vdev_id from the peer object instead after ieee80211_report_low_ack(). This will minimize the lock hold period which will improve performance since base_lock is used across the data path. This was found in code review. Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.5.0.1-00729-QCAHKSWPL_SILICONZ-3 v2 Signed-off-by: Karthikeyan Periyasamy <quic_periyasa@quicinc.com> --- drivers/net/wireless/ath/ath11k/wmi.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)