drm/i915/gt: Cancel a hung context if already closed

Use the restored ability to check if a context is closed to decide
whether or not to immediately ban the context from further execution
after a hang.

Fixes: be90e34 ("drm/i915/gt: Cancel banned contexts after GT reset")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Mika Kuoppala <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 8e37d69)
Signed-off-by: Rodrigo Vivi <[email protected]>

Author: ickle

drivers/gpu/drm/i915/gt/intel_reset.c

@@ -88,6 +88,11 @@ static bool mark_guilty(struct i915_request *rq)
 	bool banned;
 	int i;
 
+	if (intel_context_is_closed(rq->context)) {
+		intel_context_set_banned(rq->context);
+		return true;
+	}
+
 	rcu_read_lock();
 	ctx = rcu_dereference(rq->context->gem_context);
 	if (ctx && !kref_get_unless_zero(&ctx->ref))