Users of intel_gt_retire_requests_timeout() expect 0 return value on success. However, we have no protection from passing back 0 potentially returned by a call to dma_fence_wait_timeout() when it succedes right after its timeout has expired. Replace 0 with -ETIME before potentially using the timeout value as return code, so -ETIME is returned if there are still some requests not retired after timeout, 0 otherwise. v3: Use conditional expression, more compact but also better reflecting intention standing behind the change. v2: Move the added lines down so flush_submission() is not affected. Fixes: f33a8a51602c ("drm/i915: Merge wait_for_timelines with retire_request") Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com> Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com> Cc: stable@vger.kernel.org # v5.5+ Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221121145655.75141-3-janusz.krzysztofik@linux.intel.com (cherry picked from commit f301a29f143760ce8d3d6b6a8436d45d3448cde6) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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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