From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9026EC433DF for ; Tue, 25 Aug 2020 05:29:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 67A2320706 for ; Tue, 25 Aug 2020 05:29:25 +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="ZSy4/135" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728687AbgHYF3Y (ORCPT ); Tue, 25 Aug 2020 01:29:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728630AbgHYF3R (ORCPT ); Tue, 25 Aug 2020 01:29:17 -0400 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4372C061797 for ; Mon, 24 Aug 2020 22:29:16 -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=vAp1kUCxDhAD2zQ47Xojt01AZLeTeC/elLrg17j7ZvI=; b=ZSy4/1350ZFs/yzkagHOON0M3n cpC2LNsxHJogCqsUjIpss5Qz2oYCzCoBjHJ6/KIhKfQeH3iUV7M67vYDpPfVJMLz3LpA8PZrDiUsG 2N49Jtyu5ofb7Or3i8fAuq8xG2dluPXC5wkU7UqFhZv9Hb09QQWyujxVrSzWRhq00vp4=; Received: from p5b206497.dip0.t-ipconnect.de ([91.32.100.151] helo=localhost.localdomain) by ds12 with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.89) (envelope-from ) id 1kARWC-0006jr-L8 for linux-wireless@vger.kernel.org; Tue, 25 Aug 2020 07:29:12 +0200 From: Felix Fietkau To: linux-wireless@vger.kernel.org Subject: [PATCH 8/9] mt76: add memory barrier to DMA queue kick Date: Tue, 25 Aug 2020 07:29:08 +0200 Message-Id: <20200825052909.36955-8-nbd@nbd.name> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200825052909.36955-1-nbd@nbd.name> References: <20200825052909.36955-1-nbd@nbd.name> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Ensure that descriptor memory has been fully written before letting the hardware read it Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/dma.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index 7545b552db25..24ff21eedbd0 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -143,6 +143,7 @@ mt76_dma_sync_idx(struct mt76_dev *dev, struct mt76_queue *q) static void mt76_dma_kick_queue(struct mt76_dev *dev, struct mt76_queue *q) { + wmb(); writel(q->head, &q->regs->cpu_idx); } -- 2.28.0