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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D8381E99046 for ; Fri, 10 Apr 2026 07:15:39 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4fsSkf3zcrz2yr6; Fri, 10 Apr 2026 17:15:38 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=172.105.4.254 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775800309; cv=none; b=eWhiroUpHujz7U8Qp930EhzWWsRP8MKwayxfGrAT1VcSQGCENFgs4i5pHPWe0z6yxjnqphygLF84WBRRBtFUW0IqfrN3ONzaxaym7WIGUlTs370UcDr7Usskjbkr1+XdSL5oGB++q6m5RHLKqOWRWoD1euZZwu3TY7STzvFWEjuXDYlFrl8KMY4S8xi1vYB/olZqm7JyewSTojgT+p+kCqGYHiYx7AKDsMCuj/JcbTNrl/htRkuSSKuyYKgIZevdq2px/V68KmqTW+DJ4a2Yrl2gstAcl6tu9AO8UryAki+hEuwtrXPqE7G7wB9I1dSsv1HedywEONXhtrxNOzZ6Iw== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775800309; c=relaxed/relaxed; bh=FJVHBFY/MHU37My++Wq1lkK0NiXJFf//GnhUi1eqhcw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=YqdQP4cToYMrmAaefBJHBdzXNdpRvd9NU9Z+1JhVh1TOFVOnobFft1FZ8mWvpjK5d1kesr7saII1gpgqKCR9Z+iItlHosKnkImGgrBguXYrxyfho1kqkWi6eGY9hPWR0vEwLiQJgAcRPNHIg/eauEpFgwvu61qR4E0XqsQl+qkFvnmgscXeLsaAeMHe+GHBDrSjnPF0/omLY/g0eljzpjR5nRkNykbyHFZDVVEyXloQUXyx/QfaTDU/E6a7kdFQl99YVWvg/xEfUg3j+xugTC5zqvlaozoELMhqKL+pND5rSaQw8aqs+wMaPNaQdOLUD+PvlkDX4sYtSzcovLpBpTw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=L9KhOCvw; dkim-atps=neutral; spf=pass (client-ip=172.105.4.254; helo=tor.source.kernel.org; envelope-from=kwilczynski@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=L9KhOCvw; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=172.105.4.254; helo=tor.source.kernel.org; envelope-from=kwilczynski@kernel.org; receiver=lists.ozlabs.org) Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4fsQsw6zHkz2yRl for ; Fri, 10 Apr 2026 15:51:48 +1000 (AEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id ED37860181; Fri, 10 Apr 2026 05:51:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79227C19421; Fri, 10 Apr 2026 05:51:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775800306; bh=RaLaicXdVd13BfmiGv2VaH4swf8eCOhEtaGCnbo0iIg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L9KhOCvwhQBtoVpNr6HLSFDBoXOpjGQuwTz5mSKRMKHFJpTYUVqBAQbaySh5U/2c6 SN44v4MFI2F7H8mEXNOvh7jTGhAh50/IkSeVwCDEPIPKv20uDiusCSdfc/BSpG9QHP YBGH0h4FMkgUZxvnpLFjQSMJHnYmJyVLRfptvRgl1MvTA0xUpcLDWOQffjysbKv2uF w+8TwLGglwIBY8Us/Km9F1tr4EGd0DKquEmHy9UcAzhCSt66wVtWFKYS/0/3m59ISp AfIgqbwJDk9Wo0Aiv4q36+2MA0J24+dk5j22Lj+MFY2PXNYq/fVP/AoUdu/hVm1lCu 8bWvlMrIwMmpQ== From: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= To: Bjorn Helgaas Cc: Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Magnus Lindholm , Matt Turner , Richard Henderson , Christophe Leroy , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Dexuan Cui , =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= , Lukas Wunner , "Oliver O'Halloran" , Saurabh Singh Sengar , Shuan He , Srivatsa Bhat , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 17/20] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range() Date: Fri, 10 Apr 2026 05:50:37 +0000 Message-ID: <20260410055040.39233-18-kwilczynski@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260410055040.39233-1-kwilczynski@kernel.org> References: <20260410055040.39233-1-kwilczynski@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, pci_mmap_legacy_page_range() reads the legacy resource size from bus->legacy_mem->size or bus->legacy_io->size. This couples the mmap bounds check to the struct pci_bus fields that will be removed when legacy attributes are converted to static definitions. Compute the size directly from the known constants (0x100000 for memory, 0xffff for I/O) and shift by 5 bits for sparse systems. Signed-off-by: Krzysztof Wilczyński --- arch/alpha/kernel/pci-sysfs.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c index 27adfe6dbd5e..2da95d965e9c 100644 --- a/arch/alpha/kernel/pci-sysfs.c +++ b/arch/alpha/kernel/pci-sysfs.c @@ -180,8 +180,10 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma, int sparse = has_sparse(hose, mmap_type); unsigned long res_size; - res_size = (mmap_type == pci_mmap_mem) ? bus->legacy_mem->size : - bus->legacy_io->size; + res_size = (mmap_type == pci_mmap_mem) ? 0x100000 : 0xffff; + if (sparse) + res_size <<= 5; + if (!__legacy_mmap_fits(hose, vma, res_size, sparse)) return -EINVAL; -- 2.53.0