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If the USB cable is unplugged when powered on or connected to PC, it will cause the system to freeze. The final log is as follows: [ 5.109122] read descriptors [ 5.109180] read strings [ 5.113205] udc fe800000.dwc3: registering UDC driver [g1] The crash is caused by visit registers of dwc3 when PD is off. the function dwc3_gadget_set_speed is added in udc_bind_to_driver in kernel 4.19 update. We need jump of this function when dwc3 is suspended. Change-Id: Ie0337aaf225543b4e9e05ee57a5eb7416797d56e Signed-off-by: Jianing Ren <jianing.ren@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.
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