[PATCH] drm/i915: checking for NULL instead of IS_ERR() in mock selftests

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

i915_gem_request_alloc() uses error pointers.  It never returns NULLs.

Fixes: 0daf0113cff6 ("drm/i915: Mock infrastructure for request emission")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/i915/selftests/mock_request.c b/drivers/gpu/drm/i915/selftests/mock_request.c
index 0e8d2e7f8c70..8097e3693ec4 100644
--- a/drivers/gpu/drm/i915/selftests/mock_request.c
+++ b/drivers/gpu/drm/i915/selftests/mock_request.c
@@ -35,7 +35,7 @@ mock_request(struct intel_engine_cs *engine,
 
 	/* NB the i915->requests slab cache is enlarged to fit mock_request */
 	request = i915_gem_request_alloc(engine, context);
-	if (!request)
+	if (IS_ERR(request))
 		return NULL;
 
 	mock = container_of(request, typeof(*mock), base);
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