{"id":2234824,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2234824/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260508043543.217179-21-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":"<20260508043543.217179-21-kwilczynski@kernel.org>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/20260508043543.217179-21-kwilczynski@kernel.org/","date":"2026-05-08T04:35:39","name":"[v7,20/24] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"e3789956d35866af501e6525939e4894668af9de","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/20260508043543.217179-21-kwilczynski@kernel.org/mbox/","series":[{"id":503322,"url":"http://patchwork.ozlabs.org/api/1.2/series/503322/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=503322","date":"2026-05-08T04:35:20","name":"PCI: Convert all dynamic sysfs attributes to static","version":7,"mbox":"http://patchwork.ozlabs.org/series/503322/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2234824/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2234824/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=fHz1FCRU;\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=fHz1FCRU; dkim-atps=neutral;\n spf=pass (client-ip=172.234.252.31; helo=sea.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=1778215021;\n\tbh=79vPpWeuwl76jaz34iY/J6HyO6/6tH4ao0+c7EMnbMQ=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=fHz1FCRUoHZFoS13vfeHM9gmE+SRBentgLzxS3Z7PuJ5J/b21bEUW+s9aDPIvU1H/\n\t qkAVbRF7MBlhT2f2XwbRrCKDZrTHFrt00aao3Il3HqylLNwI6L1NN+0Ax3iQXJNwE6\n\t GtBy3veqo+SN4FzfTXkvHOsrPcPmFPGiNZBw51W+6PUqDFrX0uPNTD7+g1cDLqazvc\n\t vrKZeCpRTm4F7B1mh7G4kz+roO80RgtCDtYK9rnGH+nfqIShQIWK+xRbmjOmR2fWMr\n\t GlsRMomvV+S0qzx5Iwqotb6pwmeiiSThmqV1tyW3casm/AmIKDHFReBKWwBfPbcAQD\n\t bnKLHX5E7j9Pw==","From":"=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= ","To":"Bjorn Helgaas ","Cc":"Bjorn Helgaas ,\n Manivannan Sadhasivam ,\n Lorenzo Pieralisi ,\n Alex Williamson , Magnus Lindholm ,\n 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 v7 20/24] alpha/PCI: Compute legacy size in\n pci_mmap_legacy_page_range()","Date":"Fri, 8 May 2026 04:35:39 +0000","Message-ID":"<20260508043543.217179-21-kwilczynski@kernel.org>","X-Mailer":"git-send-email 2.54.0","In-Reply-To":"<20260508043543.217179-1-kwilczynski@kernel.org>","References":"<20260508043543.217179-1-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=-0.6 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 using PCI_LEGACY_MEM_SIZE (0x100000) and\nPCI_LEGACY_IO_SIZE (0xffff) macros, and shift by 5 bits for sparse\nsystems.\n\nTested-by: Magnus Lindholm \nTested-by: Shivaprasad G Bhat \nAcked-by: Magnus Lindholm \nSigned-off-by: Krzysztof Wilczyński \n---\n arch/alpha/kernel/pci-sysfs.c | 7 +++++--\n 1 file changed, 5 insertions(+), 2 deletions(-)","diff":"diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 20c97c06d755..89329910b890 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -174,8 +174,11 @@ 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) ? PCI_LEGACY_MEM_SIZE :\n+\t\t\t\t\t\t PCI_LEGACY_IO_SIZE;\n+\tif (sparse)\n+\t\tres_size <<= 5;\n+\n \tif (!__legacy_mmap_fits(hose, vma, res_size))\n \t\treturn -EINVAL;\n \n","prefixes":["v7","20/24"]}