Daniele Ceraolo Spurio 6c82c75230 drm/i915/guc: Don't send policy update for child contexts.
The GuC FW applies the parent context policy to all the children,
so individual updates to the children are not supported and we
should not send them.

Note that sending the message did not have any functional consequences,
because the GuC just drops it and logs an error; since we were trying
to set the child policy to match the parent anyway the message being
dropped was not a problem.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <john.c.harrison@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220728003339.2361010-1-daniele.ceraolospurio@intel.com
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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.
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