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b8550f11bd
The devicetree binding documentation for the Xilinx NWL PCIe root port bridge shows an example which uses an interrupt-map property to map PCI INTx interrupts to hardware IRQ numbers 1-4. The driver creates an IRQ domain with size 4, which therefore covers the hwirq range 0-3. This means that if we attempt to make use of the INTD interrupt then we're likely to hit a WARN() in irq_domain_associate() because INTD, or hwirw=4, is outside of the range covered by the IRQ domain. irq_domain_associate() will then return -EINVAL and we'll be unable to make use of INTD. Fix this by making use of the pci_irqd_intx_xlate() helper function to translate the 1-4 range used in the DT to a 0-3 range used within the driver, and stop adding 1 to decoded hwirq numbers. Whilst cleaning up INTx handling we make use of the new PCI_NUM_INTX macro & drop the custom INTX definitions. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Michal Simek <michal.simek@xilinx.com> Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.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.