From nobody Mon Nov 25 12:33:25 2024 Received: from mail-ej1-f52.google.com (mail-ej1-f52.google.com [209.85.218.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F9F81DE2AB for ; Mon, 28 Oct 2024 14:07:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730124447; cv=none; b=IdoiQLSNCHhgmJx0DE0H4LZ/IGiZ0S3dpBOlYXkvazePbssIQdDoU5kpGYGwpk4JfiMnkZ89+HVyvHi2IWZqjuF8vrAeu9IMOCW7uh5gt7fhV2KdAyGb4HCme+/AK21Igtba5jH858zcduBO0isOi9pGX6QRxYQ5Je6eBRB73NY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730124447; c=relaxed/simple; bh=GYXHeaG8wpR2BIrXpx816pDyYa9dHkRtT9dpld+pBs8=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Syq8s4yM26ftEWdHJXINbq6YI00VTxynMHFs9oGDznNE/8KF35fr5qPvJGWL7eKkDbY2CF4D8Cdi4sljUph2fKtgTU9PKoh3jRM8BykLegKreKkNcXxdCi1AZ6xcicxrpZbvNLM891yEEALSJJNAKDV0EhXUyK+lJ6qhu0vBj3o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=Fwly0pM7; arc=none smtp.client-ip=209.85.218.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="Fwly0pM7" Received: by mail-ej1-f52.google.com with SMTP id a640c23a62f3a-a9a2cdc6f0cso587623866b.2 for ; Mon, 28 Oct 2024 07:07:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1730124441; x=1730729241; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=GW6kvc4ZbQp7jOxwPlUXi8bHuXjPpwn11nTKKI/C1qY=; b=Fwly0pM7JZeed2l9/IOqhf6VXgJap3Odnu14FTJlEGBK9leaUm/+lGtlw51jL14whJ i+96cfa8Z4i6HCXX39/mC2MOE0yTiM6KxGDt04DB4uXFpN5bBhDU/ZNHXxQv7JnGDOci 9C1mnU2yr7Ll0ONE/+Y5jxfxWJyMI3SFf8aF72UmQ2RVjc6m7pljGOyy7QMKqX3OEtyy WMwgTYTXUKvRNbI2mwd5YI3cPDfjraeyiPVSd8RaeZsm8V9FriEF/rjx9rl9O8Gxmcby RYJwTD7UbCHUCJqzx/nIjP3mI9pWXWDN+rV/u4dodCc0YBzdGZGafCzIh0sSTkw76M0L D8QA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730124441; x=1730729241; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GW6kvc4ZbQp7jOxwPlUXi8bHuXjPpwn11nTKKI/C1qY=; b=HeloSJWrGw32CUrBqkQoRTqQ9yuSCvuvh+nreVfrPWgyoqCvxQhyZDwwt2wpqrJHep AHkgrd0B+PnMfWzg63SNNMWt9usZXzEcmNxTvQe0In+KvZFsksqGNpV7kvoJqBkCjG9n zlAYLd3puZRQzOJ17wd8LLgNWdYnxQr6qkk6AA2O5QCGJyi6N8RSpyvgx+hcNTpwIBTX khQwlk7rsk/BTR1gOmtiqhbgYy6Hv1u26hQUKkPhthpXSLA0s93oPga83QZl/2UGmD+C sY1TVYDD41XvioFvnwYvtp6C2mB7uHg75LtvLX+H+dg7zUwvlq9Mkre+sSFoZmKMNb5F u3Cw== X-Forwarded-Encrypted: i=1; AJvYcCWgPHsb15bQPLnAzH6DfArg0Sorgox0S1Gn86ydfk1rfb4InkRXO49904UHnxWdg9hAEigBh13BOifnI30=@vger.kernel.org X-Gm-Message-State: AOJu0Yw/8ao10tLVgfy0LtmGsU+JCf+9I7cK1dJXkNCNO0zQx5oG3Ala si1eILaO2+/hprp6/w+pRzO4mJdYOqrOewsu3nM83dWhntZlchbGq/2TZrpAgs8= X-Google-Smtp-Source: AGHT+IE5csQvNeeQQV2TiEg3S3V6yZpGcfTplYGENkEB1u6HmkJa4la0HF/+Zf2tdkb6gQWZYObepQ== X-Received: by 2002:a17:907:9452:b0:a99:fbfc:5ff3 with SMTP id a640c23a62f3a-a9de5ce1611mr802908466b.18.1730124441130; Mon, 28 Oct 2024 07:07:21 -0700 (PDT) Received: from localhost (host-79-35-211-193.retail.telecomitalia.it. [79.35.211.193]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9b1f2982ecsm376935166b.106.2024.10.28.07.07.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Oct 2024 07:07:20 -0700 (PDT) From: Andrea della Porta To: Andrea della Porta , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Broadcom internal kernel review list , Lorenzo Pieralisi , Krzysztof Wilczynski , Manivannan Sadhasivam , Bjorn Helgaas , Linus Walleij , Catalin Marinas , Will Deacon , Bartosz Golaszewski , Derek Kiernan , Dragan Cvetic , Arnd Bergmann , Greg Kroah-Hartman , Saravana Kannan , linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-gpio@vger.kernel.org, Masahiro Yamada , Stefan Wahren , Herve Codina , Luca Ceresoli , Thomas Petazzoni , Andrew Lunn Subject: [PATCH v3 06/12] of: address: Preserve the flags portion on 1:1 dma-ranges mapping Date: Mon, 28 Oct 2024 15:07:23 +0100 Message-ID: <3029857353c9499659369c1540ba887d7860670f.1730123575.git.andrea.porta@suse.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" A missing or empty dma-ranges in a DT node implies a 1:1 mapping for dma translations. In this specific case, the current behaviour is to zero out the entire specifier so that the translation could be carried on as an offset from zero. This includes address specifier that has flags (e.g. PCI ranges). Once the flags portion has been zeroed, the translation chain is broken since the mapping functions will check the upcoming address specifier against mismatching flags, always failing the 1:1 mapping and its entire purpose of always succeeding. Set to zero only the address portion while passing the flags through. Signed-off-by: Andrea della Porta Tested-by: Herve Codina --- drivers/of/address.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/of/address.c b/drivers/of/address.c index 286f0c161e33..72b6accff21c 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -455,7 +455,8 @@ static int of_translate_one(struct device_node *parent,= struct of_bus *bus, } if (ranges =3D=3D NULL || rlen =3D=3D 0) { offset =3D of_read_number(addr, na); - memset(addr, 0, pna * 4); + /* copy the address while preserving the flags */ + memset(addr + pbus->flag_cells, 0, (pna - pbus->flag_cells) * 4); pr_debug("empty ranges; 1:1 translation\n"); goto finish; } --=20 2.35.3