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[Why] amdgpu_dm_crtc_set_crc_source() will call amdgpu_dm_crtc_configure_crc_source() to enable/disable CRC generation. However, configuration will be deferred to stream enabled. If stream is not enabled, current flow will still try to get/put vblank refcount. [How] Return EINVAL to skip actions on vblank refcount when stream is not enabled. Signed-off-by: Wayne Lin <Wayne.Lin@amd.com> Reviewed-by: Chao-kai Wang <Stylon.Wang@amd.com> Acked-by: Stylon Wang <stylon.wang@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@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.