From patchwork Fri Nov 8 10:39:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrea della Porta X-Patchwork-Id: 841828 Received: from mail-ej1-f50.google.com (mail-ej1-f50.google.com [209.85.218.50]) (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 A4831197A82 for ; Fri, 8 Nov 2024 10:39:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.50 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731062342; cv=none; b=Fil1/klHifokdQIzXNTnJK5CJIwFWRbsUTtnI+kseSVHiDjUFh70E5JyH8t7kglp4hCt/B6WB24W/IZL6/BMkUlJCBmpNGZ+hP8XZOAgfjlyVY+4GjodIF7hrSA++aIuGXSM5SOej7wjSZe+MKvq8PEjsykCZOEf3Z2kW51elb8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731062342; c=relaxed/simple; bh=ZI7tjvx/GWaHe2pXNRvmtZniWMOO8iY8D9CppSRXIQ0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=InVGwIBLkqVw9k+StlqOadZK1Fzx/wrs/lPWNkta2+dePANm+bxumeNZ1N5MktygWtIk6Fak0u/XRU5SvxKurKcgkuAoKiREh2EwuC2+CSsWEDPb5bXj5fvFKuf9eh+HvgJ86XVAAs8jcvskd45nqRhpclkFSRAv6F+JsqcPGa0= 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=bzeI5eWa; arc=none smtp.client-ip=209.85.218.50 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="bzeI5eWa" Received: by mail-ej1-f50.google.com with SMTP id a640c23a62f3a-a9a628b68a7so329674266b.2 for ; Fri, 08 Nov 2024 02:39:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1731062339; x=1731667139; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jJXmxMV9Abc1uTINb2xUxHegsV2x5Sbl3192+49JM4w=; b=bzeI5eWayKRUIUnkStz9uK6qAc3mCR+mwYLXPT5Xr9wsT7e9mbuXJY387vQ1qpMqdG 7CoKfTw4c1OgblCTKPT6OaXzkjSlAmsBGm7Sj4LeNFO9FojlDMaV5Lt1i6Dw4AELDkDj On7R+UqoRVjGgxj7XcIdvMQt3Bfu1LHrjUz0FJWxuEsMBrn1/zPrmJV+ayKQHCet8xF9 iu4oJGUU1U8h4/3dpiHA1blQTvqJTTXx70SJniHB0y58kSndJU7KeazMZhht+oWRDS5N c9urFsK6pdjsKq4yjztcgW/QhLa4YGVwMUd9SEkGdj6N04/sYGSnzSl4zkf0x+UhXJ1Q shxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731062339; x=1731667139; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jJXmxMV9Abc1uTINb2xUxHegsV2x5Sbl3192+49JM4w=; b=GL6pZqWa+2bfkZ8sgJzHq/PtYEPZSqVxvVt/R3EhqrnhNeG9WM34X8D2DHNPIhvT8Y 27RG8puvX4dcguNLm3zepZW2GDSt++zIA1zqMBOVRAow5F1vYILVfB5UVKsJrY6SDgEV MJ1CbxappKFVgsudIniOd1htPepL2MCjGOTdLHDooblf8O5mh3uWL1Sv68e1e/67dnaV Yq0z4SfPNvKvKWr5RDJ3HEG3VYfA1SOtc4I51LiZbFQD13tCNy/FoPxriUBMwXhArJEw WHj59S0sxmg82nrKexWSpHZmwOdg1QOQC2MogSQBnK5VE+uTN6QyyVkQfIfmb8l2ICeC WK4w== X-Forwarded-Encrypted: i=1; AJvYcCWgvsffKYpkXBEkM0Koar6M/kpfPyoKlm4amj1T3lrSjru4MBgGyMKb3EH17d3x7+wiWBzX0nqIwo02@vger.kernel.org X-Gm-Message-State: AOJu0YyL22cbPTnfJc6Ww+YkgVwyHSLoIREc2ObxLFTl2uWwtcF/jLq1 52M7iyneThAqn2AlTzOj6aaTooDlKn09P9FvwdJ1U62ph9EWAYZLX8h163+Nytg= X-Google-Smtp-Source: AGHT+IHiQxW5gF9yi4X8bacvXjxGkk6fIrYEA4STUTYGNxpcC1/v9Tb+L2h7W5kVMF2aOK5bJYki5Q== X-Received: by 2002:a17:906:eecb:b0:a9e:b150:a99d with SMTP id a640c23a62f3a-a9eefeb4d57mr208775166b.5.1731062338980; Fri, 08 Nov 2024 02:38:58 -0800 (PST) Received: from localhost (host-79-35-211-193.retail.telecomitalia.it. [79.35.211.193]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9ee0a188besm213593566b.8.2024.11.08.02.38.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Nov 2024 02:38:58 -0800 (PST) From: Andrea della Porta To: 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 Cc: Andrea della Porta , stable@vger.kernel.org Subject: [PATCH 2/2] of: address: Preserve the flags portion on 1:1 dma-ranges mapping Date: Fri, 8 Nov 2024 11:39:21 +0100 Message-ID: X-Mailer: git-send-email 2.44.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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. Fixes: dbbdee94734b ("of/address: Merge all of the bus translation code") Cc: stable@vger.kernel.org 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 == NULL || rlen == 0) { offset = 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; }