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Thomas Gleixner 46d3575209 PCI/MSI: Handle the NOMASK flag correctly for all PCI/MSI backends [ Upstream commit `3ece3e8e59` ] The conversion of the XEN specific global variable pci_msi_ignore_mask to a MSI domain flag, missed the facts that: 1) Legacy architectures do not provide a interrupt domain 2) Parent MSI domains do not necessarily have a domain info attached Both cases result in an unconditional NULL pointer dereference. This was unfortunatly missed in review and testing revealed it late. Cure this by using the existing pci_msi_domain_supports() helper, which handles all possible cases correctly. Fixes: `c3164d2e0d` ("PCI/MSI: Convert pci_msi_ignore_mask to per MSI domain flag") Reported-by: Daniel Gomez <da.gomez@kernel.org> Reported-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Juergen Gross <jgross@suse.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Borislav Petkov <bp@alien8.de> Tested-by: Daniel Gomez <da.gomez@kernel.org> Link: https://lore.kernel.org/all/87iknwyp2o.ffs@tglx Closes: https://lore.kernel.org/all/qn7fzggcj6qe6r6gdbwcz23pzdz2jx64aldccmsuheabhmjgrt@tawf5nfwuvw7 Stable-dep-of: `cf761e3dac` ("PCI/MSI: Add an option to write MSIX ENTRY_DATA before any reads") Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2025-05-02 07:58:56 +02:00
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README

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.