From 044df863c98d4d4be6306f3251a9397f22418946 Mon Sep 17 00:00:00 2001 From: =?utf8?q?J=C3=A9r=C3=B4me=20Pouiller?= Date: Wed, 15 Jan 2020 13:54:29 +0000 Subject: [PATCH] staging: wfx: fix __wfx_flush() when drop == false MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit wfx_tx_queues_clear() only clear not yet sent requests. So, it always necessary to wait for tx_queue_stats.wait_link_id_empty whatever the value of "drop" argument. In add, it is not necessary to return with tx queue locked since all calls to __wfx_flush() unlock the tx queue just after the call to __wfx_tx_flush(). Signed-off-by: Jérôme Pouiller Link: https://lore.kernel.org/r/20200115135338.14374-20-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wfx/queue.c | 2 -- drivers/staging/wfx/sta.c | 42 ++++++++++--------------------------- 2 files changed, 11 insertions(+), 33 deletions(-) diff --git a/drivers/staging/wfx/queue.c b/drivers/staging/wfx/queue.c index abfbad7c9f751..92bb9a794f309 100644 --- a/drivers/staging/wfx/queue.c +++ b/drivers/staging/wfx/queue.c @@ -31,8 +31,6 @@ void wfx_tx_flush(struct wfx_dev *wdev) { int ret; - WARN(!atomic_read(&wdev->tx_lock), "tx_lock is not locked"); - // Do not wait for any reply if chip is frozen if (wdev->chip_frozen) return; diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c index 0c73691ab736c..3d665eef8ba79 100644 --- a/drivers/staging/wfx/sta.c +++ b/drivers/staging/wfx/sta.c @@ -343,42 +343,25 @@ int wfx_set_rts_threshold(struct ieee80211_hw *hw, u32 value) return 0; } -/* If successful, LOCKS the TX queue! */ static int __wfx_flush(struct wfx_dev *wdev, bool drop) { - int ret; - for (;;) { - if (drop) { + if (drop) wfx_tx_queues_clear(wdev); - } else { - ret = wait_event_timeout( - wdev->tx_queue_stats.wait_link_id_empty, - wfx_tx_queues_is_empty(wdev), - 2 * HZ); - } - - if (!drop && ret <= 0) { - ret = -ETIMEDOUT; - break; - } - ret = 0; - - wfx_tx_lock_flush(wdev); - if (!wfx_tx_queues_is_empty(wdev)) { - /* Highly unlikely: WSM requeued frames. */ - wfx_tx_unlock(wdev); - continue; - } - break; + if (wait_event_timeout(wdev->tx_queue_stats.wait_link_id_empty, + wfx_tx_queues_is_empty(wdev), + 2 * HZ) <= 0) + return -ETIMEDOUT; + wfx_tx_flush(wdev); + if (wfx_tx_queues_is_empty(wdev)) + return 0; + dev_warn(wdev->dev, "frames queued while flushing tx queues"); } - return ret; } void wfx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u32 queues, bool drop) { - struct wfx_dev *wdev = hw->priv; struct wfx_vif *wvif; if (vif) { @@ -389,10 +372,8 @@ void wfx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, !wvif->enable_beacon) drop = true; } - // FIXME: only flush requested vif - if (!__wfx_flush(wdev, drop)) - wfx_tx_unlock(wdev); + __wfx_flush(hw->priv, drop); } /* WSM callbacks */ @@ -1046,8 +1027,7 @@ static int wfx_set_tim_impl(struct wfx_vif *wvif, bool aid0_bit_set) skb = ieee80211_beacon_get_tim(wvif->wdev->hw, wvif->vif, &tim_offset, &tim_length); if (!skb) { - if (!__wfx_flush(wvif->wdev, true)) - wfx_tx_unlock(wvif->wdev); + __wfx_flush(wvif->wdev, true); return -ENOENT; } tim_ptr = skb->data + tim_offset; -- 2.30.2