[PATCH i-g-t v6] tests/intel/xe_exec_fault_mode: Don't return early

[Nirmoy Das <nirmoy.das@intel.com>]

Tests that are causing pagefaults should wait for exec queue to
ban/finish otherwise pending engine resets because of on-going
pagefaults would cause failure in subsequent tests to fail.

Not all execs will generate page faults and in such case reading ban
property is not enough but the signal should either -EIO or 0.
so read that instead.

v2: specify timeout reason and iterate over exec_queues(Andrzej)
v3: increase timeout
v4: check for signal status to be -EIO/0.
v5: code rearrangement and other minor fixes(Andrzej)
v6: commit message fix(Tejas)

Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Kamil Konieczny <kamil.konieczny@linux.intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Tejas Upadhyay <tejas.upadhyay@intel.com>
Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1630
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 tests/intel/xe_exec_fault_mode.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/tests/intel/xe_exec_fault_mode.c b/tests/intel/xe_exec_fault_mode.c
index 1f1f1e50b..9cc51b7d3 100644
--- a/tests/intel/xe_exec_fault_mode.c
+++ b/tests/intel/xe_exec_fault_mode.c
@@ -324,9 +324,19 @@ test_exec(int fd, struct drm_xe_engine_class_instance *eci,
 	xe_wait_ufence(fd, &data[0].vm_sync, USER_FENCE_VALUE,
 		       bind_exec_queues[0], NSEC_PER_SEC);
 
-	if (!(flags & INVALID_FAULT) && !(flags & INVALID_VA)) {
+	if (flags & INVALID_FAULT) {
+		for (i = 0; i < n_execs; i++) {
+			int ret;
+			int64_t timeout = NSEC_PER_SEC;
+
+			ret = __xe_wait_ufence(fd, &data[i].exec_sync, USER_FENCE_VALUE,
+					       exec_queues[i % n_exec_queues], &timeout);
+			igt_assert(ret == -EIO || ret == 0);
+		}
+	} else if (!(flags & INVALID_VA)) {
 		for (i = j; i < n_execs; i++)
-				igt_assert_eq(data[i].data, 0xc0ffee);
+			igt_assert_eq(data[i].data, 0xc0ffee);
+
 	}
 
 	for (i = 0; i < n_exec_queues; i++) {
-- 
2.42.0