Mario Limonciello
7cbb5c6f9a
The action of saving the PCI state will cause numerous PCI configuration space reads which depending upon the vendor implementation may cause the drive to exit the deepest NVMe state. In these cases ASPM will typically resolve the PCIe link state and APST may resolve the NVMe power state. However it has also been observed that this register access after quiesced will cause PC10 failure on some device combinations. To resolve this, move the PCI state saving to before SetFeatures has been called. This has been proven to resolve the issue across a 5000 sample test on previously failing disk/system combinations. Signed-off-by: Mario Limonciello <mario.limonciello@dell.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
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.