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977509f7c5
Previously we didn't check the type of device before trying to apply Type 1 (PCI-X) or Type 2 (PCIe) Setting Records from _HPX. We don't support PCI-X Setting Records, so this was harmless, but the warning was useless. We do support PCIe Setting Records, and we didn't check whether a device was PCIe before applying settings. I don't think anything bad happened on non-PCIe devices because pcie_capability_clear_and_set_word(), pcie_cap_has_lnkctl(), etc., would fail before doing any harm. But it's ugly to depend on those internals. Check the device type before attempting to apply Type 1 and Type 2 Setting Records (Type 0 records are applicable to PCI, PCI-X, and PCIe devices). A side benefit is that this prevents useless "not supported" warnings when a BIOS supplies a Type 1 (PCI-X) Setting Record and we try to apply it to every single device: pci 0000:00:00.0: PCI-X settings not supported After this patch, we'll get the warning only when a BIOS supplies a Type 1 record and we have a PCI-X device to which it should be applied. Link: https://bugzilla.kernel.org/show_bug.cgi?id=187731 Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.