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On Android systems, After temporarily putting device to S2 by short pressing the power button on the remote, the display turns off. Then press the power button to turn the display back up. Adb devices would show the devices is offline. It needs a physical disconnect of the usb cable or power cycle to bring the device back online. The device is operational otherwise. The problem is that during S2 resume, the ADB gadget driver could not link back with the BDC driver because the endpoint flags were cleared. The fix is to clear the endpoint flags for the disconnect case only and not for S2 exit. Signed-off-by: Al Cooper <alcooperx@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
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.