Nirmoy Das fb78189899 drm/i915: Do not cleanup obj with NULL bo->resource
For delayed BO release i915_ttm_delete_mem_notify()
gets called twice, once with proper bo->resource and
another time with NULL. We shouldn't do anything for
the 2nd time as we already cleaned up the obj once.

References: https://gitlab.freedesktop.org/drm/intel/-/issues/6850
Fixes: ad74457a6b ("drm/i915/dgfx: Release mmap on rpm suspend")
Signed-off-by: Nirmoy Das <[email protected]>
Reviewed-by: Matthew Auld <[email protected]>
Signed-off-by: Matthew Auld <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2022-09-21 10:45:08 +01:00
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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.
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