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Tomasz Lis d72312d730 drm/xe: Protect against unset LRC when pausing submissions
While pausing submissions, it is possible to encouner an exec queue
which is during creation, and therefore doesn't have a valid xe_lrc
struct reference.

Protect agains such situation, by checking for NULL before access.

Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Fixes: c25c1010df ("drm/xe/vf: Replay GuC submission state on pause / unpause")
Signed-off-by: Tomasz Lis <tomasz.lis@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20251124222853.1900800-1-tomasz.lis@intel.com
(cherry picked from commit 07cf4b864f)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
History 2025-12-01 10:16:17 +01:00
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README

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 reStructuredText 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.