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If we pardon a per-engine reset, we may leave the STOP_RING bit asserted in RING_MI_MODE resulting in the engine hanging. Unconditionally clear it on the per-engine exit path as we know that either we skipped the reset and so need the cancellation, or the reset was successful and the cancellation is a no-op, or there was an error and we will follow up with a full-reset or wedging (both of which will stop the engines again as required). Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107188 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106560 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180814171857.24673-1-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.
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.