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143e64df1b
The event_ring_deq parameter is used to check if the event ring dequeue position is updated while calling by xhci_handle_event(), meaning there was an actual event on the ring to handle. In this case the driver needs to inform hardware about the updated dequeue position. Basically event_ring_deq just stores the old event ring dequeue position before calling the event handler. Keeping track of software event dequeue updates this way is no longer useful as driver anyways reads the current hardware dequeue position within the handle event, and checks if it needs to be updated. The driver might anyway need to modify the EHB (event handler busy) bit in the same register as the dequeue pointer even if the actual dequeue position did not change. Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> Link: https://lore.kernel.org/r/20240217001017.29969-5-quic_wcheng@quicinc.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.