[Intel-gfx] [PATCH i-g-t v2 2/3] tests/gem_exec_fence: Exclude 0 from use in store batches

[Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>]

When i = 0, condition out[i] == i will be true even if a batch supposed
to store i in out[i] fails.  Don't use i = 0 in batches that store values
in out[i].

v2: still check for out[0] == 0 (Chris)

Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
---
 tests/i915/gem_exec_fence.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/tests/i915/gem_exec_fence.c b/tests/i915/gem_exec_fence.c
index 048870053a..78d83460f7 100644
--- a/tests/i915/gem_exec_fence.c
+++ b/tests/i915/gem_exec_fence.c
@@ -334,6 +334,8 @@ static void test_fence_await(int fd, const intel_ctx_t *ctx,
 		if (!gem_class_can_store_dword(fd, e2->class))
 			continue;
 
+		i++;
+
 		if (flags & NONBLOCK) {
 			igt_store_word(fd, ahnd, ctx, e2, spin->out_fence,
 				       scratch, scratch_offset, i, i);
@@ -345,8 +347,6 @@ static void test_fence_await(int fd, const intel_ctx_t *ctx,
 				put_ahnd(ahnd);
 			}
 		}
-
-		i++;
 	}
 
 	igt_spin_busywait_until_started(spin);
@@ -356,7 +356,7 @@ static void test_fence_await(int fd, const intel_ctx_t *ctx,
 	if ((flags & HANG) == 0) {
 		/* Check for invalidly completing the task early */
 		igt_assert(fence_busy(spin->out_fence));
-		for (int n = 0; n < i; n++)
+		for (int n = 0; n <= i; n++)
 			igt_assert_eq_u32(out[n], 0);
 
 		igt_spin_end(spin);
@@ -366,8 +366,11 @@ static void test_fence_await(int fd, const intel_ctx_t *ctx,
 
 	gem_set_domain(fd, scratch, I915_GEM_DOMAIN_GTT, 0);
 	igt_assert(!fence_busy(spin->out_fence));
-	while ((flags & HANG) == 0 && i--)
-		igt_assert_eq_u32(out[i], i);
+	if ((flags & HANG) == 0) {
+		do
+			igt_assert_eq_u32(out[i], i);
+		while (i--);
+	}
 	munmap(out, 4096);
 
 	igt_spin_free(fd, spin);
-- 
2.25.1