As setup takes a long time, the user may close the context during the
construction of the execbuf. In order to make sure we correctly track
all outstanding work with non-persistent contexts, we need to serialise
the submission with the context closure and mop up any leaks.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 87fa5f42c39a..b2311fe93ad8 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -2729,6 +2729,12 @@ i915_gem_do_execbuffer(struct drm_device *dev,
goto err_batch_unpin;
}
+ /* Check that the context wasn't destroyed before setup */
+ if (!rcu_access_pointer(eb.context->gem_context)) {
+ err = -ENOENT;
+ goto err_request;
+ }
+
if (in_fence) {
err = i915_request_await_dma_fence(eb.request, in_fence);
if (err < 0)
--
2.25.0
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