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{
    "id": 2224098,
    "url": "http://patchwork.ozlabs.org/api/patches/2224098/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260416180107.777065-21-kwilczynski@kernel.org/",
    "project": {
        "id": 28,
        "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api",
        "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": "<20260416180107.777065-21-kwilczynski@kernel.org>",
    "list_archive_url": null,
    "date": "2026-04-16T18:01:04",
    "name": "[v5,20/23] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "b6b24a47539cf93216538b739d3236819080b1ac",
    "submitter": {
        "id": 86709,
        "url": "http://patchwork.ozlabs.org/api/people/86709/?format=api",
        "name": "Krzysztof Wilczyński",
        "email": "kwilczynski@kernel.org"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260416180107.777065-21-kwilczynski@kernel.org/mbox/",
    "series": [
        {
            "id": 500193,
            "url": "http://patchwork.ozlabs.org/api/series/500193/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=500193",
            "date": "2026-04-16T18:00:44",
            "name": "PCI: Convert all dynamic sysfs attributes to static",
            "version": 5,
            "mbox": "http://patchwork.ozlabs.org/series/500193/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2224098/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2224098/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        "From": "=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= <kwilczynski@kernel.org>",
        "To": "Bjorn Helgaas <bhelgaas@google.com>",
        "Cc": "Bjorn Helgaas <helgaas@kernel.org>,\n Manivannan Sadhasivam <mani@kernel.org>,\n Lorenzo Pieralisi <lpieralisi@kernel.org>,\n Magnus Lindholm <linmag7@gmail.com>, Matt Turner <mattst88@gmail.com>,\n Richard Henderson <richard.henderson@linaro.org>,\n Christophe Leroy <chleroy@kernel.org>,\n Madhavan Srinivasan <maddy@linux.ibm.com>,\n Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>,\n Dexuan Cui <decui@microsoft.com>,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= <khalasa@piap.pl>,\n Lukas Wunner <lukas@wunner.de>, \"Oliver O'Halloran\" <oohall@gmail.com>,\n Saurabh Singh Sengar <ssengar@microsoft.com>,\n Shuan He <heshuan@bytedance.com>, Srivatsa Bhat <srivatsabhat@microsoft.com>,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,\n linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,\n linuxppc-dev@lists.ozlabs.org",
        "Subject": "[PATCH v5 20/23] alpha/PCI: Compute legacy size in\n pci_mmap_legacy_page_range()",
        "Date": "Thu, 16 Apr 2026 18:01:04 +0000",
        "Message-ID": "<20260416180107.777065-21-kwilczynski@kernel.org>",
        "X-Mailer": "git-send-email 2.53.0",
        "In-Reply-To": "<20260416180107.777065-1-kwilczynski@kernel.org>",
        "References": "<20260416180107.777065-1-kwilczynski@kernel.org>",
        "Precedence": "bulk",
        "X-Mailing-List": "linux-pci@vger.kernel.org",
        "List-Id": "<linux-pci.vger.kernel.org>",
        "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>",
        "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>",
        "MIME-Version": "1.0",
        "Content-Type": "text/plain; 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\nTested-by: Magnus Lindholm <linmag7@gmail.com>\nAcked-by: Magnus Lindholm <linmag7@gmail.com>\nSigned-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>\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..b986ff1e7a82 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": [
        "v5",
        "20/23"
    ]
}