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pci_msix_free_irq() is used to free an interrupt on a PCI/MSI-X interrupt domain. The API description specifies that the interrupt to be freed was allocated via pci_msix_alloc_irq_at(). This description limits the usage of pci_msix_free_irq() since pci_msix_free_irq() can also be used to free MSI-X interrupts allocated with, for example, pci_alloc_irq_vectors(). Remove the text stating that the interrupt to be freed had to be allocated with pci_msix_alloc_irq_at(). The needed struct msi_map need not be from pci_msix_alloc_irq_at() but can be created from scratch using pci_irq_vector() to obtain the Linux IRQ number. Highlight that pci_msix_free_irq() cannot be used to disable MSI-X to guide users that, for example, pci_free_irq_vectors() remains to be needed. Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Link: https://lore.kernel.org/lkml/87r0xsd8j4.ffs@tglx Link: https://lore.kernel.org/r/4c3e7a50d6e70f408812cd7ab199c6b4b326f9de.1676408572.git.reinette.chatre@intel.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.