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The current code returns -ENOMEM if test->bar[barno] is NULL. There can be two reasons why test->bar[barno] is NULL: 1) The pci_ioremap_bar() call in pci_endpoint_test_probe() failed. 2) The BAR was skipped, because it is disabled by the endpoint. Many PCI endpoint controller drivers will disable all BARs in their init function. A disabled BAR will have a size of 0. A PCI endpoint function driver will be able to enable any BAR that is not marked as BAR_RESERVED (which means that the BAR should not be touched by the EPF driver). Thus, perform check if the size is 0, before checking if test->bar[barno] is NULL, such that we can return different errors. This will allow the selftests to return SKIP instead of FAIL for disabled BARs. Signed-off-by: Niklas Cassel <cassel@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/20250123120147.3603409-3-cassel@kernel.org Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> [kwilczynski: commit log] Signed-off-by: Krzysztof Wilczyński <kwilczynski@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 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.