From 7c5fc1d88c1e91b3319145fe30f291a2cb9b393a Mon Sep 17 00:00:00 2001 From: =?utf8?q?J=C3=A9r=C3=B4me=20Pouiller?= Date: Fri, 15 May 2020 10:33:23 +0200 Subject: [PATCH] staging: wfx: remove false-positive WARN() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The function wfx_tx_flush() wait for there is no more queued frames in hardware queue. Then, for the sanity, it checks that there is no more pending frame on any AC queue. However, there is a race here. It may happens that hardware queues are empty, but the counters of the AC queues are not yet updated. So, it may produce false-positive warning. The easiest way to solve the problem is just to remove the sanity check. Signed-off-by: Jérôme Pouiller Link: https://lore.kernel.org/r/20200515083325.378539-18-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wfx/queue.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/staging/wfx/queue.c b/drivers/staging/wfx/queue.c index 0c799cedd1013..26b141cbd3035 100644 --- a/drivers/staging/wfx/queue.c +++ b/drivers/staging/wfx/queue.c @@ -30,7 +30,6 @@ void wfx_tx_unlock(struct wfx_dev *wdev) void wfx_tx_flush(struct wfx_dev *wdev) { int ret; - int i; // Do not wait for any reply if chip is frozen if (wdev->chip_frozen) @@ -41,12 +40,6 @@ void wfx_tx_flush(struct wfx_dev *wdev) ret = wait_event_timeout(wdev->hif.tx_buffers_empty, !wdev->hif.tx_buffers_used, msecs_to_jiffies(3000)); - if (ret) { - for (i = 0; i < IEEE80211_NUM_ACS; i++) - WARN(atomic_read(&wdev->tx_queue[i].pending_frames), - "there are still %d pending frames on queue %d", - atomic_read(&wdev->tx_queue[i].pending_frames), i); - } if (!ret) { dev_warn(wdev->dev, "cannot flush tx buffers (%d still busy)\n", wdev->hif.tx_buffers_used); -- 2.30.2