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Lukas Wunner 15dea68d41 Documentation: PCI: Amend error recovery doc with DPC/AER specifics
Amend the documentation on PCI error recovery with specifics about
Downstream Port Containment and Advanced Error Reporting:

* Explain that with DPC, devices are inaccessible upon an error (similar
  to EEH on powerpc) and do not become accessible until the link is
  re-enabled.

* Explain that with AER, although devices may already be accessible in the
  ->error_detected() callback, accesses should be deferred to the
  ->mmio_enabled() callback for compatibility with EEH on powerpc and with
  s390.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Link: https://patch.msgid.link/61d8eeadb20ee71c3a852f44c863bfe0209c454d.1757942121.git.lukas@wunner.de
History 2025-09-16 10:53:25 -05:00
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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.