[13/17] drm/i915/gem: Check that the context wasn't closed during setup
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Message ID 20200226094314.1500667-13-chris@chris-wilson.co.uk
State New
Headers show
Series
  • [01/17] drm/i915/gt: Reset queue_priority_hint after wedging
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Commit Message

Chris Wilson Feb. 26, 2020, 9:43 a.m. UTC
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@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 ++++++
 1 file changed, 6 insertions(+)

Patch
diff mbox series

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index fe1e50937fe2..66d45629cc0d 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -2736,6 +2736,12 @@  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)