[Intel-gfx] [RFC PATCH i-g-t 6/8] tests/core_hotunplug: Add 'GEM object' variant

[Janusz Krzysztofik]

GEM objects belonging to user file descriptors still open on device
hotunplug may exhibit still more driver issues.  Add a subtest that
implements this scenario.

Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik at linux.intel.com>
---
 tests/core_hotunplug.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/tests/core_hotunplug.c b/tests/core_hotunplug.c
index 6d9f530b1..309d4efef 100644
--- a/tests/core_hotunplug.c
+++ b/tests/core_hotunplug.c
@@ -355,6 +355,29 @@ static void vm_hotunplug_lateclose(void)
 	healthcheck();
 }
 
+static void gem_hotunplug_lateclose(void)
+{
+	struct hotunplug priv;
+
+	prepare_for_rescan(&priv);
+
+	igt_require_gem(priv.fd.drm);
+
+	local_debug("creating a GEM user object");
+	igt_ignore_warn(gem_create(priv.fd.drm, 4096));
+
+	local_debug("hot unplugging the device");
+	device_unplug(priv.fd.sysfs_dev);
+
+	local_debug("late closing the removed device instance");
+	close(priv.fd.drm);
+
+	local_debug("recovering the device");
+	bus_rescan(priv.fd.sysfs_bus);
+
+	healthcheck();
+}
+
 /* Main */
 
 igt_main
@@ -434,4 +457,11 @@ igt_main
 
 	igt_fixture
 		igt_abort_on_f(failure, "%s\n", failure);
+
+	igt_describe("Check if a device with a still open GEM object can be cleanly unplugged, then released and recovered");
+	igt_subtest("gem-hotunplug-lateclose")
+		gem_hotunplug_lateclose();
+
+	igt_fixture
+		igt_abort_on_f(failure, "%s\n", failure);
 }
-- 
2.21.1