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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 0D788C43600 for ; Wed, 12 May 2021 17:55:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C697F61166 for ; Wed, 12 May 2021 17:55:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347046AbhELRpW (ORCPT ); Wed, 12 May 2021 13:45:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:59090 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240373AbhELQR4 (ORCPT ); Wed, 12 May 2021 12:17:56 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id BC81E619A1; Wed, 12 May 2021 15:43:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620834239; bh=yxWuWUXLICmglpa67NgIU1IjQoO4kS1LM+x4OlC3pNk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0khfh/9lqr6jq98V3+8pVxsgj0qrktsDC1l9tfDyZw4xkBAiBPvpQj4xDkKKxAKP+ JnIi7o6BFerjIYkX7UTc+jiWqijTckz+HUS4Pz1xFbOkHOFw2zzDkLBJBLQRZHDaxa /jnrBFrG9zpBWVah3ERgYu1rUR05lWKTL67+vdx4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ben Greear , Felix Fietkau , Sasha Levin Subject: [PATCH 5.11 464/601] mt76: mt7915: fix tx skb dma unmap Date: Wed, 12 May 2021 16:49:01 +0200 Message-Id: <20210512144843.118622831@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Felix Fietkau [ Upstream commit 7dcf3c04f0aca746517a77433b33d40868ca4749 ] The first pointer in the txp needs to be unmapped as well, otherwise it will leak DMA mapping entries Reported-by: Ben Greear Fixes: 27d5c528a7ca ("mt76: fix double DMA unmap of the first buffer on 7615/7915") Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c index c9dd6867e125..8a083304ab03 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c @@ -1082,7 +1082,7 @@ void mt7915_txp_skb_unmap(struct mt76_dev *dev, int i; txp = mt7915_txwi_to_txp(dev, t); - for (i = 1; i < txp->nbuf; i++) + for (i = 0; i < txp->nbuf; i++) dma_unmap_single(dev->dev, le32_to_cpu(txp->buf[i]), le16_to_cpu(txp->len[i]), DMA_TO_DEVICE); } -- 2.30.2