{"id":2222348,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2222348/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260411080148.471335-22-kwilczynski@kernel.org/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.2/projects/28/?format=json","name":"Linux PCI development","link_name":"linux-pci","list_id":"linux-pci.vger.kernel.org","list_email":"linux-pci@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260411080148.471335-22-kwilczynski@kernel.org>","list_archive_url":null,"date":"2026-04-11T08:01:45","name":"[v4,21/24] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"9170f6b1d8df1df2635af4ccb7b913e1919c4d6b","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/linux-pci/patch/20260411080148.471335-22-kwilczynski@kernel.org/mbox/","series":[{"id":499539,"url":"http://patchwork.ozlabs.org/api/1.2/series/499539/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/list/?series=499539","date":"2026-04-11T08:01:24","name":"PCI: Convert all dynamic sysfs attributes to static","version":4,"mbox":"http://patchwork.ozlabs.org/series/499539/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2222348/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2222348/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.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=f8NEYhhq;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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charset=UTF-8","Content-Transfer-Encoding":"8bit"},"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\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 2e9693e5abe1..a9dea147528d 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -180,8 +180,11 @@ 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, sparse))\n \t\treturn -EINVAL;\n \n","prefixes":["v4","21/24"]}