[PATCH 1/2] drm/i915/selftests: check the return value of i915_gem_object_trylock()

[Rolf Eike Beer <eb@emlix.com>]

A trylock can fail, in which case operating on the object is unsafe and
unconditionally unlocking is wrong.

Signed-off-by: Rolf Eike Beer <eb@emlix.com>
---
 drivers/gpu/drm/i915/gt/selftest_migrate.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_migrate.c b/drivers/gpu/drm/i915/gt/selftest_migrate.c
index ca460cee4f8b..b2cb501febe8 100644
--- a/drivers/gpu/drm/i915/gt/selftest_migrate.c
+++ b/drivers/gpu/drm/i915/gt/selftest_migrate.c
@@ -822,7 +822,10 @@ create_init_lmem_internal(struct intel_gt *gt, size_t sz, bool try_lmem)
 			return obj;
 	}
 
-	i915_gem_object_trylock(obj, NULL);
+	if (!i915_gem_object_trylock(obj, NULL)) {
+		i915_gem_object_put(obj);
+		return ERR_PTR(-EBUSY);
+	}
 	err = i915_gem_object_pin_pages(obj);
 	if (err) {
 		i915_gem_object_unlock(obj);
-- 
2.47.1


-- 
Rolf Eike Beer

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