From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 25 Jun 2019 13:01:22 +0000 (+0100)
Subject: drm/i915/selftests: Hold ref on request across waits
X-Git-Tag: v5.4-rc1~106^2~19^2~308
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=c8d84778e52733cbbc05c1f3ea77635feb099642;p=linux.git

drm/i915/selftests: Hold ref on request across waits

As we wait upon the request, we should be sure to hold our own reference
for our checks.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190625130128.11009-14-chris@chris-wilson.co.uk
---

diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index 0fdf948a93a0..1bbfc43d4a9e 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -75,55 +75,58 @@ static int igt_wait_request(void *arg)
 		err = -ENOMEM;
 		goto out_unlock;
 	}
+	i915_request_get(request);
 
 	if (i915_request_wait(request, 0, 0) != -ETIME) {
 		pr_err("request wait (busy query) succeeded (expected timeout before submit!)\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	if (i915_request_wait(request, 0, T) != -ETIME) {
 		pr_err("request wait succeeded (expected timeout before submit!)\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	if (i915_request_completed(request)) {
 		pr_err("request completed before submit!!\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	i915_request_add(request);
 
 	if (i915_request_wait(request, 0, 0) != -ETIME) {
 		pr_err("request wait (busy query) succeeded (expected timeout after submit!)\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	if (i915_request_completed(request)) {
 		pr_err("request completed immediately!\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	if (i915_request_wait(request, 0, T / 2) != -ETIME) {
 		pr_err("request wait succeeded (expected timeout!)\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	if (i915_request_wait(request, 0, T) == -ETIME) {
 		pr_err("request wait timed out!\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	if (!i915_request_completed(request)) {
 		pr_err("request not complete after waiting!\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	if (i915_request_wait(request, 0, T) == -ETIME) {
 		pr_err("request wait timed out when already complete!\n");
-		goto out_unlock;
+		goto out_request;
 	}
 
 	err = 0;
+out_request:
+	i915_request_put(request);
 out_unlock:
 	mock_device_flush(i915);
 	mutex_unlock(&i915->drm.struct_mutex);