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1b967691ec
When a USB device attached to a hub got disconnected, MUSB controller generates RXCSR_RX_ERROR interrupt for the 3-strikes-out error. Currently the MUSB host driver returns -EPROTO in current URB, then the USB device driver could immediately resubmit the URB which causes MUSB generate RXCSR_RX_ERROR interrupt again. This circle causes interrupt storm then the hub never got a chance to report the USB device detach. To fix the interrupt storm, change the URB return code to -ESHUTDOWN for MUSB_RXCSR_H_ERROR interrupt, so that the USB device driver will not immediately resubmit the URB. Signed-off-by: Bin Liu <b-liu@ti.com> Link: https://lore.kernel.org/r/20200525025049.3400-2-b-liu@ti.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.