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The controller will be reinit when suspend and resume in device mode if not connect to PC. And the U2PHY must be keep in power on state during the init process. But The 'otg_sm_work' may be schedule immediately and power off the U2PHY if system suspend and resume between the delay time of schedule 'otg_sm_work', so it will result in the error when init controller as below: dwc2_core_reset() HANG! Soft Reset GRSTCTL=80000001 So flush the otg work in exit function to finish power control of U2PHY. Change-Id: I79c4b6a877196abd2f2201b2f984c9ea22e48fec Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com> Signed-off-by: Frank Wang <frank.wang@rock-chips.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.
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.