{"id":2221720,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2221720/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410055040.39233-18-kwilczynski@kernel.org/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.2/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<20260410055040.39233-18-kwilczynski@kernel.org>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/20260410055040.39233-18-kwilczynski@kernel.org/","date":"2026-04-10T05:50:37","name":"[17/20] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"8beb55edb48bc5648b1dedd871063e1b2f28af02","submitter":{"id":86709,"url":"http://patchwork.ozlabs.org/api/1.2/people/86709/?format=json","name":"Krzysztof Wilczyński","email":"kwilczynski@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410055040.39233-18-kwilczynski@kernel.org/mbox/","series":[{"id":499413,"url":"http://patchwork.ozlabs.org/api/1.2/series/499413/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499413","date":"2026-04-10T05:50:20","name":"PCI: Convert all dynamic sysfs attributes to static","version":1,"mbox":"http://patchwork.ozlabs.org/series/499413/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2221720/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2221720/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=L9KhOCvw;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=L9KhOCvw; dkim-atps=neutral;\n spf=pass (client-ip=172.105.4.254; helo=tor.source.kernel.org;\n envelope-from=kwilczynski@kernel.org;\n receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775800306;\n\tbh=RaLaicXdVd13BfmiGv2VaH4swf8eCOhEtaGCnbo0iIg=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=L9KhOCvwhQBtoVpNr6HLSFDBoXOpjGQuwTz5mSKRMKHFJpTYUVqBAQbaySh5U/2c6\n\t SN44v4MFI2F7H8mEXNOvh7jTGhAh50/IkSeVwCDEPIPKv20uDiusCSdfc/BSpG9QHP\n\t YBGH0h4FMkgUZxvnpLFjQSMJHnYmJyVLRfptvRgl1MvTA0xUpcLDWOQffjysbKv2uF\n\t w+8TwLGglwIBY8Us/Km9F1tr4EGd0DKquEmHy9UcAzhCSt66wVtWFKYS/0/3m59ISp\n\t AfIgqbwJDk9Wo0Aiv4q36+2MA0J24+dk5j22Lj+MFY2PXNYq/fVP/AoUdu/hVm1lCu\n\t 8bWvlMrIwMmpQ==","From":"=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= ","To":"Bjorn Helgaas ","Cc":"Bjorn Helgaas ,\n Manivannan Sadhasivam ,\n Lorenzo Pieralisi ,\n Magnus Lindholm , Matt Turner ,\n Richard Henderson ,\n Christophe Leroy ,\n Madhavan Srinivasan ,\n Michael Ellerman , Nicholas Piggin ,\n Dexuan Cui ,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= ,\n Lukas Wunner , \"Oliver O'Halloran\" ,\n Saurabh Singh Sengar ,\n Shuan He , Srivatsa Bhat ,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= ,\n linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,\n linuxppc-dev@lists.ozlabs.org","Subject":"[PATCH 17/20] alpha/PCI: Compute legacy size in\n 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":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","Precedence":"list","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"8bit","X-Spam-Status":"No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"Currently, pci_mmap_legacy_page_range() reads the legacy resource\nsize from bus->legacy_mem->size or bus->legacy_io->size. This\ncouples the mmap bounds check to the struct pci_bus fields that\nwill be removed when legacy attributes are converted to static\ndefinitions.\n\nCompute the size directly from the known constants (0x100000 for\nmemory, 0xffff for I/O) and shift by 5 bits for sparse systems.\n\nSigned-off-by: Krzysztof Wilczyński \n---\n arch/alpha/kernel/pci-sysfs.c | 6 ++++--\n 1 file changed, 4 insertions(+), 2 deletions(-)","diff":"diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 27adfe6dbd5e..2da95d965e9c 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -180,8 +180,10 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,\n \tint sparse = has_sparse(hose, mmap_type);\n \tunsigned long res_size;\n \n-\tres_size = (mmap_type == pci_mmap_mem) ? bus->legacy_mem->size :\n-\t\t\t\t\t\t bus->legacy_io->size;\n+\tres_size = (mmap_type == pci_mmap_mem) ? 0x100000 : 0xffff;\n+\tif (sparse)\n+\t\tres_size <<= 5;\n+\n \tif (!__legacy_mmap_fits(hose, vma, res_size, sparse))\n \t\treturn -EINVAL;\n \n","prefixes":["17/20"]}