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If MSI or MSI-X is enabled, the device uses that. It uses INTx only if both MSI and MSI-X are disabled (see PCIe r4.0, sec 7.7.1.2), so if a device already has MSI or MSI-X enabled, there's no need to set up its legacy INTx interrupt.bba6f6fc68("[PATCH] MSI-X: fix resume crash") changed the cris, frv, x86, and ia64 arches to skip INTx setup when MSI is enabled. The cris and frv arches have since been removed.16cf0ebc35("x86/PCI: Do not use interrupt links for devices using MSI-X") extended that by changing x86 to also skip INTx setup when MSI-X is enabled. Change ia64 to skip INTx setup when either MSI or MSI-X is enabled by applying the logic from16cf0ebc35to ia64 as well as x86. Tested-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
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.