If we fail to recover the HW state upon resume (i.e. our attempt to
clear the wedged bit and reset during i915_gem_sanitize() fails), then
skip the HW restart inside i915_gem_init_hw(). We will ultimate do the
the HW restart when sucessfully unwedgeding and reseting the HW later,
but attempting to restore a wedged device upon resume is risky as the HW
is in an unknown state.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index d9d39b309ce8..5993222c81ae 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4835,6 +4835,10 @@ int i915_gem_init_hw(struct drm_i915_private *dev_priv)
init_unused_rings(dev_priv);
BUG_ON(!dev_priv->kernel_context);
+ if (i915_terminally_wedged(&dev_priv->gpu_error)) {
+ ret = -EIO;
+ goto out;
+ }
ret = i915_ppgtt_init_hw(dev_priv);
if (ret) {
--
2.15.0.rc0
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