[Intel-gfx] [PATCH i-g-t] i915/hangman: Skip if disabled by the kernel

[Chris Wilson]

Some kernels may have to disable error capture for some hardware or by
it being configured out. Since it is conditionally available, asserting
it exists is not an actual requirement. For hardware where we are unable
to provide error state capture, skip.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 tests/i915/hangman.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/tests/i915/hangman.c b/tests/i915/hangman.c
index 6ddae4912..4035f7384 100644
--- a/tests/i915/hangman.c
+++ b/tests/i915/hangman.c
@@ -42,13 +42,16 @@
 static int device = -1;
 static int sysfs = -1;
 
-static void test_sysfs_error_exists(void)
+static bool has_error_state(int dir)
 {
-	char *error;
+	int fd;
 
-	error = igt_sysfs_get(sysfs, "error");
-	igt_assert(error);
-	free(error);
+	fd = openat(dir, "error", O_RDONLY);
+	if (fd < 0)
+		return false;
+
+	close(fd);
+	return true;
 }
 
 static void assert_entry(const char *s, bool expect)
@@ -256,12 +259,12 @@ igt_main
 
 		device = drm_open_driver(DRIVER_INTEL);
 		igt_require_gem(device);
+
 		sysfs = igt_sysfs_open(device, &idx);
 		igt_assert(sysfs != -1);
-	}
 
-	igt_subtest("error-state-sysfs-entry")
-		test_sysfs_error_exists();
+		igt_require(has_error_state(sysfs));
+	}
 
 	igt_subtest("error-state-basic")
 		test_error_state_basic();
-- 
2.20.1