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In the scenario of setting underlay, dc_validate_global_state() is called after constructing the context with all relevant bottom_pipe related configurations in dm_update_planes_state(). Currently, in dc_validate_global_state(), without checking for bottom_pipe's existence, the pipe_ctx structure is initialised to 0, hence nullyfying the plane_state of bottom_pipe which shall be accessed in populate_initial_data() called from bw_calcs(). Due to this null pointer access kernel panics and leads to reboot when underlay is tried to set. This patch fixes the issue by no longer clearing the top_pipe. This workaround is no longer required. Signed-off-by: Shirish S <shirish.s@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.