Commit ad658685 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/selftests: Change priority overflow detection 



Check for integer overflow in the priority chain, rather than against a
type-constricted max-priority check.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200519063123.20673-2-chris@chris-wilson.co.uk
parent b86fc6e5

drivers/gpu/drm/i915/gt/selftest_lrc.c

+3 −3
Original line number Diff line number Diff line
@@ -2735,12 +2735,12 @@ static int live_preempt_gang(void *arg) 
			/* Submit each spinner at increasing priority */

			engine->schedule(rq, &attr);



			if (prio < attr.priority)

				break;



			if (prio <= I915_PRIORITY_MAX)

				continue;



			if (prio > (INT_MAX >> I915_USER_PRIORITY_SHIFT))

				break;



			if (__igt_timeout(end_time, NULL))

				break;

		} while (1);

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