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commit 8bea147dfdf823eaa8d3baeccc7aeb041b41944b upstream. When there's phy initialization, we need to initiate a soft-reset sequence. That's done through USBCMD.HCRST in the xHCI driver and its initialization, However, the dwc3 driver may modify core configs before the soft-reset. This may result in some connection instability. So, ensure the phy is ready before the controller updates the GCTL.PRTCAPDIR or other settings by issuing phy soft-reset. Note that some host-mode configurations may not expose device registers to initiate the controller soft-reset (via DCTL.CoreSftRst). So we reset through GUSB3PIPECTL and GUSB2PHYCFG instead. Cc: stable@vger.kernel.org Fixes: e835c0a4e23c ("usb: dwc3: don't reset device side if dwc3 was configured as host-only") Reported-by: Kenta Sato <tosainu.maple@gmail.com> Closes: https://lore.kernel.org/linux-usb/ZPUciRLUcjDywMVS@debian.me/ Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Tested-by: Kenta Sato <tosainu.maple@gmail.com> Link: https://lore.kernel.org/r/70aea513215d273669152696cc02b20ddcdb6f1a.1694564261.git.Thinh.Nguyen@synopsys.com 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.