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238f65aeea
Switching from device mode to host mode by disconnecting device cable core enters and exits form hibernation. However, the fifo map remains not cleared. It results to a WARNING (WARNING: CPU: 5 PID: 0 at drivers/usb/dwc2/ gadget.c:307 dwc2_hsotg_init_fifo+0x12/0x152 [dwc2]) if in host mode we disconnect the micro a to b host cable. Because core reset occurs. To avoid the WARNING, fifo_map should be cleared in dwc2_core_reset() function by taking into account configs. fifo_map must be cleared only if driver is configured in "CONFIG_USB_DWC2_PERIPHERAL" or "CONFIG_USB_DWC2_DUAL_ROLE" mode. - Added "static inline void dwc2_clear_fifo_map()" helper function to clear fifo_map with peripheral or dual role mode. - Added a dummy version of "dwc2_clear_fifo_map()" helper for host-only mode. Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> Link: https://lore.kernel.org/r/20210416124731.C500AA005D@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.