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PCI Vendor-Specific (VSEC) Capabilities are defined by each vendor. Devices from different vendors may advertise a VSEC Capability with the DWC RAS DES functionality, but the vendors may assign different VSEC IDs. Search for the DWC RAS DES Capability using the VSEC ID and VSEC Rev chosen by the vendor. This does not fix a current problem because Alibaba, Ampere, and Qualcomm all assigned the same VSEC ID and VSEC Rev for the DWC RAS DES Capability. The potential issue is that we may add support for a device from another vendor, where the vendor has already assigned DWC_PCIE_VSEC_RAS_DES_ID (0x02) for an unrelated VSEC. In that event, dwc_pcie_des_cap() would find the unrelated VSEC and mistakenly assume it was a DWC RAS DES Capability. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-and-tested-by: Ilkka Koskinen <ilkka@os.amperecomputing.com> Reviewed-and-tested-by: Shuai Xue <xueshuai@linux.alibaba.com> Link: https://lore.kernel.org/r/20241209222938.3219364-1-helgaas@kernel.org Signed-off-by: Will Deacon <will@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.