[Intel-gfx] [PATCH] drm/i915: Ignore -EIO from __i915_wait_request() during mmio flip

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

When the GPU gets reset __i915_wait_request() returns -EIO to the
mmio flip worker. Currently we WARN whenever we get anything other
than 0. Ignore the -EIO too since it's a perfectly normal thing
to get during a GPU reset.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9bf759c..3cd0935 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11327,11 +11327,13 @@ static void intel_mmio_flip_work_func(struct work_struct *work)
 	struct intel_mmio_flip *mmio_flip =
 		container_of(work, struct intel_mmio_flip, work);
 
-	if (mmio_flip->req)
-		WARN_ON(__i915_wait_request(mmio_flip->req,
-					    mmio_flip->crtc->reset_counter,
-					    false, NULL,
-					    &mmio_flip->i915->rps.mmioflips));
+	if (mmio_flip->req) {
+		int ret = __i915_wait_request(mmio_flip->req,
+					      mmio_flip->crtc->reset_counter,
+					      false, NULL,
+					      &mmio_flip->i915->rps.mmioflips);
+		WARN_ON(ret != 0 && ret != -EIO);
+	}
 
 	intel_do_mmio_flip(mmio_flip->crtc);
 
-- 
2.3.6