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f7c8930d9e
When ring hang happens amdgpu_dm_commit_planes during flip is holding the BO reserved and then stack waiting for fences to signal in reservation_object_wait_timeout_rcu (which won't signal because there was a hnag). Then when we try to shutdown display block during reset recovery from drm_atomic_helper_suspend we also try to reserve the BO from dm_plane_helper_cleanup_fb ending in deadlock. Also remove useless WARN_ON Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.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.
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.