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kernel-program-behaviour-models

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    Mathias Nyman authored and Greg Kroah-Hartman committed
    xhci supports soft retry recovery when the host halted the host side of an
    endopint but the connected USB device is not aware of the halt.
    
    In this case xhci needs to issue a reset endopint command  with a TSP
    (Transfer State Preserve) flag set which preserves the Data toggle
    and Sequence number of the endpoint.
    
    This feature is needed to handle a few special transfer event types
    such as USB Transaction error that don't always point to a causing TRB.
    
    see xhci 4.6.8.1 for more details
    
    Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    21749148
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    Linux kernel
    ============
    
    This file was moved to Documentation/admin-guide/README.rst
    
    Please notice that there are several guides for kernel developers and users.
    These guides can be rendered in a number of formats, like HTML and PDF.
    
    In order to build the documentation, use ``make htmldocs`` or
    ``make pdfdocs``.
    
    There are various text files in the Documentation/ subdirectory,
    several of them using the Restructured Text markup notation.
    See Documentation/00-INDEX for a list of what is contained in each file.
    
    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.