[Intel-gfx] [PATCH i-g-t] Check all sysfs entries are readable without dmesg spam

[Chris Wilson]

We already check that debugfs do not cause spam (and they tend to be
more heavyhanded and so more likely to break), but that does not excuse
not checking our sysfs directory!

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 tests/debugfs_test.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tests/debugfs_test.c b/tests/debugfs_test.c
index f8dd851c9..2d4753df5 100644
--- a/tests/debugfs_test.c
+++ b/tests/debugfs_test.c
@@ -56,7 +56,7 @@ static void read_and_discard_sysfs_entries(int path_fd, int indent)
 			igt_debug("%sEntering subdir %s\n", tabs, dirent->d_name);
 			read_and_discard_sysfs_entries(sub_fd, indent + 1);
 			close(sub_fd);
-		} else {
+		} else if (dirent->d_type == DT_REG) {
 			char buf[512];
 			int sub_fd;
 			ssize_t ret;
@@ -149,7 +149,7 @@ static void kms_tests(int fd, int debugfs)
 
 igt_main
 {
-	int fd = -1, debugfs;
+	int fd = -1, debugfs, sysfs;
 
 	igt_skip_on_simulation();
 
@@ -157,10 +157,13 @@ igt_main
 		fd = drm_open_driver_master(DRIVER_INTEL);
 		igt_require_gem(fd);
 		debugfs = igt_debugfs_dir(fd);
+		sysfs = igt_sysfs_open(fd);
 
 		kmstest_set_vt_graphics_mode();
 	}
 
+	igt_subtest("sysfs")
+		read_and_discard_sysfs_entries(sysfs, 0);
 	igt_subtest("read_all_entries")
 		read_and_discard_sysfs_entries(debugfs, 0);
 
@@ -168,6 +171,7 @@ igt_main
 		kms_tests(fd, debugfs);
 
 	igt_fixture {
+		close(sysfs);
 		close(debugfs);
 		close(fd);
 	}
-- 
2.23.0