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e30da71b23
According to xHCI spec v1.1 section 6.4.5 TRB Completion Codes, the standard XHCI controller provide a TRB Completion Status 'USB Transaction Error' to asserted in the case where the host did not receive a valid response from the device, it's useful to handle pending URBs on the endpoint when the USB device is plugged out. Unfortunately, some SOCs USB 3.0 modules lose the ability to assert the 'USB Transaction Error' status when USB 3.0 device disconnect. This may cause the pending URBs unhandled, even lead to USB class driver stalled in waiting for URBs complete. This patch flush pending URBs in usb_disable_device() when USB 3.0 device disconnect, it will call xhci_urb_dequeue() -> xhci_queue_stop_endpoint() to cancel pending URBs and giveback URB status immediately. Change-Id: If8acac59bc1f2c10a41ee390ccbeb84b2e7743c1 Signed-off-by: Feng Mingli <fml@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.