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With slow links (<= 5GT/s) active link reporting is not mandatory, so if a device is disconnected during system sleep we might end up waiting for it to respond for ~60s, which slows down resume time. PCIe r6.0, sec 6.6.1, mandates that software must wait for at least 1s before it can assume a device is broken, so use that minimum requirement for slow links and bail out if the device doesn't respond within 1s. However, if the port supports active link reporting we can wait longer as we do with the fast links. This should make system resume time faster for slow links as well while still following the PCIe spec. While there move the PCI_RESET_WAIT constant into pci.c because it is not used outside of that file anymore. Link: https://lore.kernel.org/r/20230425064751.24951-1-mika.westerberg@linux.intel.com Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
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.