From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-lf0-x242.google.com ([2a00:1450:4010:c07::242]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fFJg5-0005vI-Cn for ath10k@lists.infradead.org; Sun, 06 May 2018 13:26:14 +0000 Received: by mail-lf0-x242.google.com with SMTP id g12-v6so36895910lfb.10 for ; Sun, 06 May 2018 06:26:00 -0700 (PDT) From: Erik Stromdahl Subject: [PATCH] ath10k: fix return value check in wake_tx_q op Date: Sun, 6 May 2018 15:25:00 +0200 Message-Id: <20180506132500.16888-1-erik.stromdahl@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: kvalo@qca.qualcomm.com, linux-wireless@vger.kernel.org, ath10k@lists.infradead.org Cc: Erik Stromdahl ath10k_mac_tx_push_txq returns either a postive integer (length) on success or a negative error code on error. The "if (ret) break;" statement will thus always break out of the loop immediately after ath10k_mac_tx_push_txq has returned (making the loop pointless). A side effect of this fix is that we will iterate the queue until ath10k_mac_tx_push_txq returns -ENOENT. This will make sure the queue is not added back to ar->txqs when it is empty. This could potentially improve performance somewhat (I have seen a small improvement with SDIO devices). Signed-off-by: Erik Stromdahl --- drivers/net/wireless/ath/ath10k/mac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 3d7119ad7c7a..487a7a7380fd 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -4290,7 +4290,7 @@ static void ath10k_mac_op_wake_tx_queue(struct ieee80211_hw *hw, while (ath10k_mac_tx_can_push(hw, f_txq) && max--) { ret = ath10k_mac_tx_push_txq(hw, f_txq); - if (ret) + if (ret < 0) break; } if (ret != -ENOENT) -- 2.17.0 _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k