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If something has gone awry with the CSB processing, we need to pause, unwind and restart the request submission and event processing. However, currently we skip the engine reset if we raise an error but discover no active context, in the mistaken belief that it was merely a glitch in the matrix. The glitches are real enough, and we do need to unwind even if the engine appears idle (as it has gone permanently idle!) The simplest way to unwind and recover is simply do the engine reset, which should be very fast and _safe_ as nothing is active. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200711091349.28865-1-chris@chris-wilson.co.uk
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.