Return-path: Received: from mail-wi0-f175.google.com ([209.85.212.175]:49701 "EHLO mail-wi0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759807AbbA3Imy (ORCPT ); Fri, 30 Jan 2015 03:42:54 -0500 Received: by mail-wi0-f175.google.com with SMTP id fb4so1363059wid.2 for ; Fri, 30 Jan 2015 00:42:53 -0800 (PST) From: Michal Kazior To: ath10k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Michal Kazior Subject: [PATCH 4/7] ath10k: protect ar->arvifs linking with data_lock Date: Fri, 30 Jan 2015 09:41:24 +0100 Message-Id: <1422607287-12289-5-git-send-email-michal.kazior@tieto.com> (sfid-20150130_094307_439737_49A91606) In-Reply-To: <1422607287-12289-1-git-send-email-michal.kazior@tieto.com> References: <1422607287-12289-1-git-send-email-michal.kazior@tieto.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: This will make it possible to iterate over interface list while in an atomic context, i.e. tasklet. Caller should still be careful with accessing arvif structures though. Signed-off-by: Michal Kazior --- drivers/net/wireless/ath/ath10k/mac.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 16fddc7..721b2ce 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -3325,7 +3325,10 @@ static int ath10k_add_interface(struct ieee80211_hw *hw, } ar->free_vdev_map &= ~(1LL << arvif->vdev_id); + + spin_lock_bh(&ar->data_lock); list_add(&arvif->list, &ar->arvifs); + spin_unlock_bh(&ar->data_lock); /* It makes no sense to have firmware do keepalives. mac80211 already * takes care of this with idle connection polling. @@ -3452,7 +3455,9 @@ err_peer_delete: err_vdev_delete: ath10k_wmi_vdev_delete(ar, arvif->vdev_id); ar->free_vdev_map |= 1LL << arvif->vdev_id; + spin_lock_bh(&ar->data_lock); list_del(&arvif->list); + spin_unlock_bh(&ar->data_lock); err: if (arvif->beacon_buf) { @@ -3487,7 +3492,10 @@ static void ath10k_remove_interface(struct ieee80211_hw *hw, arvif->vdev_id, ret); ar->free_vdev_map |= 1LL << arvif->vdev_id; + + spin_lock_bh(&ar->data_lock); list_del(&arvif->list); + spin_unlock_bh(&ar->data_lock); if (arvif->vdev_type == WMI_VDEV_TYPE_AP) { ret = ath10k_peer_delete(arvif->ar, arvif->vdev_id, vif->addr); -- 1.8.5.3