From patchwork Mon Aug 10 08:58:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 11707163 X-Patchwork-Delegate: nbd@nbd.name Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 880A0174A for ; Mon, 10 Aug 2020 08:58:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6546B20716 for ; Mon, 10 Aug 2020 08:58:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=nbd.name header.i=@nbd.name header.b="MPqjpy8s" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726644AbgHJI6j (ORCPT ); Mon, 10 Aug 2020 04:58:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726259AbgHJI6h (ORCPT ); Mon, 10 Aug 2020 04:58:37 -0400 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B610C061786 for ; Mon, 10 Aug 2020 01:58:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=jqTJmqYtGq7UFVYJHyyBDTGEjW+nY1UNd5tYP3/AU5g=; b=MPqjpy8skQa5Zv727sphxRipmG cjSbQNHo172Q5mM1iDtp7Dn2cbo2nAapNANv2ZTwk4uh7Z9Fs+hzKjgRRqYB8ofbp4dKxq4Raapvv A3CkrgQBDUPzEMzGi3W2iwvHkY1HIq+mCdXHm+zG6RccyTqrHh2rCwV2jtFUyQNgcFXY=; Received: from p54ae996c.dip0.t-ipconnect.de ([84.174.153.108] helo=localhost.localdomain) by ds12 with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.89) (envelope-from ) id 1k53da-0003XJ-Jz for linux-wireless@vger.kernel.org; Mon, 10 Aug 2020 10:58:34 +0200 From: Felix Fietkau To: linux-wireless@vger.kernel.org Subject: [PATCH 5/6] mt76: mt7615: do not do any work in napi poll after calling napi_complete_done() Date: Mon, 10 Aug 2020 10:58:31 +0200 Message-Id: <20200810085832.65662-5-nbd@nbd.name> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200810085832.65662-1-nbd@nbd.name> References: <20200810085832.65662-1-nbd@nbd.name> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Fixes a race condition where multiple tx cleanup tasks could run in parallel Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mt7615/dma.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c index c876eb1e1681..3b375fdf31b8 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c @@ -117,14 +117,12 @@ static int mt7615_poll_tx(struct napi_struct *napi, int budget) mt7615_tx_cleanup(dev); - if (napi_complete_done(napi, 0)) - mt7615_irq_enable(dev, MT_INT_TX_DONE_ALL); - - mt7615_tx_cleanup(dev); - mt7615_pm_power_save_sched(dev); tasklet_schedule(&dev->mt76.tx_tasklet); + if (napi_complete_done(napi, 0)) + mt7615_irq_enable(dev, MT_INT_TX_DONE_ALL); + return 0; }