drm/i915/selftests: Fixup GuC FW negative test

Since:
0d4b78b3d2c0 ("drm/i915/guc: Assert we have the doorbell before setting it up")

We have asserts in GuC doorbell related functions, which is a good thing.
Unfortunately, we were using those to check whether GuC FW is refusing
to allocate invalid doorbell - which makes the test fail.
Well, it would make the test WARN, except we fumbled cleanup ordering
and eat the BUG_ON instead.
Let's keep the asserts and use the internal implementation in the test.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107186
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180712112013.3253-1-chris@chris-wilson.co.uk
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/selftests/intel_guc.c b/drivers/gpu/drm/i915/selftests/intel_guc.c
index fb74e2c..407c98f 100644 (file)
--- a/drivers/gpu/drm/i915/selftests/intel_guc.c
+++ b/drivers/gpu/drm/i915/selftests/intel_guc.c
@@ -196,19 +196,23 @@ static int igt_guc_clients(void *args)
        }
 
        unreserve_doorbell(guc->execbuf_client);
-       err = guc_clients_doorbell_init(guc);
+
+       __create_doorbell(guc->execbuf_client);
+       err = __guc_allocate_doorbell(guc, guc->execbuf_client->stage_id);
        if (err != -EIO) {
                pr_err("unexpected (err = %d)", err);
-               goto out;
+               goto out_db;
        }
 
        if (!available_dbs(guc, guc->execbuf_client->priority)) {
                pr_err("doorbell not available when it should\n");
                err = -EIO;
-               goto out;
+               goto out_db;
        }
 
+out_db:
        /* clean after test */
+       __destroy_doorbell(guc->execbuf_client);
        err = reserve_doorbell(guc->execbuf_client);
        if (err) {
                pr_err("failed to reserve back the doorbell back\n");