mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-03-22 07:27:12 +08:00
2bd42b03ab
Typically pdev->irq is consistent with whether the device itself supports INTx, where device support is reported via the PIN register. Therefore the PIN register is often already zero if pdev->irq is zero. Recently virtualization of the PIN register was expanded to include the case where the device supports INTx but the platform does not route the interrupt. This is reported by a value of IRQ_NOTCONNECTED on some architectures. Other architectures just report zero for pdev->irq. We already disallow INTx setup if pdev->irq is zero, therefore add this to the PIN register virtualization criteria so that a consistent view is provided to userspace through virtualized config space and ioctls. Reported-by: Shivaprasad G Bhat <sbhat@linux.ibm.com> Link: https://lore.kernel.org/all/174231895238.2295.12586708771396482526.stgit@linux.ibm.com/ Tested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com> Link: https://lore.kernel.org/r/20250320194145.2816379-1-alex.williamson@redhat.com Signed-off-by: Alex Williamson <alex.williamson@redhat.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 reStructuredText 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.