[Intel-gfx] [PATCH 09/18] drm/i915: Be irqsafe inside reset

[Chris Wilson]

As we want to be able to call i915_reset_engine and co from a softirq or
timer context, we need to be irqsafe at all timers. So we have to forgo
the simple spin_lock_irq for the full spin_lock_irqsave.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0a3f6a41525b..42a387ff0eaa 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3130,15 +3130,17 @@ i915_gem_reset_request(struct intel_engine_cs *engine,
 		 */
 		request = i915_gem_find_active_request(engine);
 		if (request) {
+			unsigned long flags;
+
 			i915_gem_context_mark_innocent(request->ctx);
 			dma_fence_set_error(&request->fence, -EAGAIN);
 
 			/* Rewind the engine to replay the incomplete rq */
-			spin_lock_irq(&engine->timeline->lock);
+			spin_lock_irqsave(&engine->timeline->lock, flags);
 			request = list_prev_entry(request, link);
 			if (&request->link == &engine->timeline->requests)
 				request = NULL;
-			spin_unlock_irq(&engine->timeline->lock);
+			spin_unlock_irqrestore(&engine->timeline->lock, flags);
 		}
 	}
 
-- 
2.17.0