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commit f195fc1e9715ba826c3b62d58038f760f66a4fe9 upstream. The AMD [1022:15b8] USB controller loses some internal functional MSI-X context when transitioning from D0 to D3hot. BIOS normally traps D0->D3hot and D3hot->D0 transitions so it can save and restore that internal context, but some firmware in the field can't do this because it fails to clear the AMD_15B8_RCC_DEV2_EPF0_STRAP2 NO_SOFT_RESET bit. Clear AMD_15B8_RCC_DEV2_EPF0_STRAP2 NO_SOFT_RESET bit before USB controller initialization during boot. Link: https://lore.kernel.org/linux-usb/Y%2Fz9GdHjPyF2rNG3@glanzmann.de/T/#u Link: https://lore.kernel.org/r/20230329172859.699743-1-Basavaraj.Natikar@amd.com Reported-by: Thomas Glanzmann <thomas@glanzmann.de> Tested-by: Thomas Glanzmann <thomas@glanzmann.de> Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.