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commit ddf983488c3e8d30d5c2e2b315ae7d9cd87096ed upstream. [Why] During resume, observe that we receive CSN event before we start topology probing. Handling CSN at this moment based on uncertain topology is unnecessary. [How] Add checking condition in drm_dp_mst_handle_up_req() to skip handling CSN if the topology is yet to be probed. Cc: Lyude Paul <lyude@redhat.com> Cc: Harry Wentland <hwentlan@amd.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: stable@vger.kernel.org Signed-off-by: Wayne Lin <Wayne.Lin@amd.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240626084825.878565-3-Wayne.Lin@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.