drm/i915: Call io_schedule() whilst whilsting for the GPU

Since we are waiting upon IO completion, inform the kernel through use
of the io_schedule() call rather than the regular schedule(). This
should allow the kernel to make better decisions regarding scheduling
and power management.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 13c885d663833332181750ea8b22559a477f4161..7dc9c9c7778c08f52a1ad0a5a827a173a2e1677b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1082,7 +1082,7 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
                        mod_timer(&timer, expire);
                }
 
-               schedule();
+               io_schedule();
 
                if (timeout)
                        timeout_jiffies = expire - jiffies;