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[ Upstream commit 16df67f2189a71a8310bcebddb87ed569e8352be ] The two implementers of vfio_device_ops.device_feature, vfio_cdx_ioctl_feature and vfio_pci_core_ioctl_feature, return -ENOTTY in the fallthrough case when the feature is unsupported. For consistency, the base case, vfio_ioctl_device_feature, should do the same when device_feature == NULL, indicating an implementation has no feature extensions. Signed-off-by: Alex Mastro <amastro@fb.com> Link: https://lore.kernel.org/r/20250908-vfio-enotty-v1-1-4428e1539e2e@fb.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.