drm/i915: Handle GPU hangs during fault gracefully.
Instead of killing the process, just return no page found and reschedule
the process giving the GPU some time to (hopefully) recover.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 47c665e..7c91bf2 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1340,11 +1340,12 @@
mutex_unlock(&dev->struct_mutex);
switch (ret) {
+ case -EAGAIN:
+ set_need_resched();
case 0:
case -ERESTARTSYS:
return VM_FAULT_NOPAGE;
case -ENOMEM:
- case -EAGAIN:
return VM_FAULT_OOM;
default:
return VM_FAULT_SIGBUS;