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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 81248C432C0 for ; Mon, 18 Nov 2019 11:24:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 556552068D for ; Mon, 18 Nov 2019 11:24:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=rasmusvillemoes.dk header.i=@rasmusvillemoes.dk header.b="QtCF582M" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727573AbfKRLYz (ORCPT ); Mon, 18 Nov 2019 06:24:55 -0500 Received: from mail-wr1-f68.google.com ([209.85.221.68]:38027 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727460AbfKRLYd (ORCPT ); Mon, 18 Nov 2019 06:24:33 -0500 Received: by mail-wr1-f68.google.com with SMTP id i12so18995495wro.5 for ; Mon, 18 Nov 2019 03:24:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rasmusvillemoes.dk; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=SKjk4xtgUQ/kA6JZGPtMJVtONpNy6V4lFIeGBwHjI8g=; b=QtCF582MFVIFUAE0sBGhcnpWjLaKcMJuHBmrKQSENS+VvCOL11gQdMW8atajXJA2em kMb/rDoirxRW0vhZP33J+/jeZLSWRclHGRqPwHLuvpPjdAmwLCRTLHjmhdLBSc+TtOWY iLVuDZnvsXId6BXLCalrliqwxuijTqlROC53Y= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=SKjk4xtgUQ/kA6JZGPtMJVtONpNy6V4lFIeGBwHjI8g=; b=VHb2DFjOSO1jhvrd08OoPcOoc8NTuqVNauVzuWf26X9rXz32t1PWIUHyDSqLGbQrJg RCb88IXfsb738mJ9INFCd130m3yJdrWTP3DHUUwB4hTrN1MEoILdPfJnS4EzW9eXsQQX XLA5l69XPnQg5v1i2Y6LkfoM5M7gKqLKTYbJJA1EnzlJoRf7rb6NsQbIOphujAdUnNMs HfqgHuapbhvE12reQTIoBIVdcrM5NrLOKBaXOpeNeEzywmO6eQilkvkWrNo7v3nYbGn7 6s5ejE8qb0UOnoUa7Zfid/eYFs38bBRxWljrIuc5kNZac5MS8T1h59T0YesXZRohbUIS ST7Q== X-Gm-Message-State: APjAAAXdzK/Qsq+x8QreYNl7OwIMIsi7gawoDcbLlDXBsX6IGYdU5OwZ DjxceYzbsmApJv/11flh1ze7AQ== X-Google-Smtp-Source: APXvYqzfWvl1cOreV62JRtAha4euFED3eBmtooUgfkfMzTKXNFT+VQz7x317y2h7bdDCVKAQxJWUvQ== X-Received: by 2002:a5d:4b86:: with SMTP id b6mr22999180wrt.143.1574076270973; Mon, 18 Nov 2019 03:24:30 -0800 (PST) Received: from prevas-ravi.prevas.se (ip-5-186-115-54.cgn.fibianet.dk. [5.186.115.54]) by smtp.gmail.com with ESMTPSA id y2sm21140815wmy.2.2019.11.18.03.24.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2019 03:24:30 -0800 (PST) From: Rasmus Villemoes To: Qiang Zhao , Li Yang , Christophe Leroy Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Scott Wood , Timur Tabi , Rasmus Villemoes , netdev@vger.kernel.org Subject: [PATCH v5 45/48] net/wan/fsl_ucc_hdlc: fix reading of __be16 registers Date: Mon, 18 Nov 2019 12:23:21 +0100 Message-Id: <20191118112324.22725-46-linux@rasmusvillemoes.dk> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191118112324.22725-1-linux@rasmusvillemoes.dk> References: <20191118112324.22725-1-linux@rasmusvillemoes.dk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When releasing the allocated muram resource, we rely on reading back the offsets from the riptr/tiptr registers. But those registers are __be16 (and we indeed write them using iowrite16be), so we can't just read them back with a normal C dereference. This is not currently a real problem, since for now the driver is PPC32-only. But it will soon be allowed to be used on arm and arm64 as well. Signed-off-by: Rasmus Villemoes --- drivers/net/wan/fsl_ucc_hdlc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c index 405b24a5a60d..8d13586bb774 100644 --- a/drivers/net/wan/fsl_ucc_hdlc.c +++ b/drivers/net/wan/fsl_ucc_hdlc.c @@ -732,8 +732,8 @@ static int uhdlc_open(struct net_device *dev) static void uhdlc_memclean(struct ucc_hdlc_private *priv) { - qe_muram_free(priv->ucc_pram->riptr); - qe_muram_free(priv->ucc_pram->tiptr); + qe_muram_free(ioread16be(&priv->ucc_pram->riptr)); + qe_muram_free(ioread16be(&priv->ucc_pram->tiptr)); if (priv->rx_bd_base) { dma_free_coherent(priv->dev, -- 2.23.0