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58fa1760d0
intel_prepare_plane_fb() bails early if there is no fb (or rather no obj, which is the same thing). intel_cleanup_plane_fb() does not. This means the steps performed by intel_cleanup_plane_fb() aren't balanced with with what was done intel_prepare_plane_fb() if there is no fb for the plane. These hooks get called for every plane in the state regardless of whether they have an fb or not. Add a matching null obj check to intel_cleanup_plane_fb() to restore the balance. Note that intel_cleanup_plane_fb() has sufficient protections already in place that the imbalance doesn't cause any real problems. But having things be in balance seems nicer anyway, and might help avoid some surprises in the future. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200110183228.8199-5-ville.syrjala@linux.intel.com Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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.