lib/i915: Cleanup errno before starting tests

Since we probe the existence of the engines, we expect errno to be
randomly set prior to starting the test. Lets reset it to 0 so that any
error before the igt_dynamic_f test is not mistakenly printed by a
failed test.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/i915/gem_engine_topology.c b/lib/i915/gem_engine_topology.c
index 3b3ce8d1..2c0ae5a2 100644
--- a/lib/i915/gem_engine_topology.c
+++ b/lib/i915/gem_engine_topology.c
@@ -485,6 +485,7 @@ void dyn_sysfs_engines(int i915, int engines, const char *file,
 					igt_require(fstatat(engine, file, &st, 0) == 0);
 				}
 
+				errno = 0; /* start afresh */
 				test(i915, engine);
 			}