Return-path: Received: from mail-wg0-f42.google.com ([74.125.82.42]:51605 "EHLO mail-wg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932263AbbAILOv (ORCPT ); Fri, 9 Jan 2015 06:14:51 -0500 Received: by mail-wg0-f42.google.com with SMTP id k14so7512692wgh.1 for ; Fri, 09 Jan 2015 03:14:50 -0800 (PST) From: Michal Kazior To: ath10k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Michal Kazior Subject: [RFC 5/8] ath10k: protect ar->arvifs linking with data_lock Date: Fri, 9 Jan 2015 12:14:06 +0100 Message-Id: <1420802049-11962-6-git-send-email-michal.kazior@tieto.com> (sfid-20150109_121506_264728_C63AF51E) In-Reply-To: <1420802049-11962-1-git-send-email-michal.kazior@tieto.com> References: <1420802049-11962-1-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 b175827..fed8cc9 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -3283,7 +3283,10 @@ 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); vdev_param = ar->wmi.vdev_param->def_keyid; ret = ath10k_wmi_vdev_set_param(ar, 0, vdev_param, @@ -3400,7 +3403,9 @@ 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) { @@ -3435,7 +3440,10 @@ 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_wmi_peer_delete(arvif->ar, arvif->vdev_id, -- 1.8.5.3