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-rw-r--r--drivers/gpu/drm/i915/i915_gem.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index ee896d91c5b..b189b49c760 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1691,11 +1691,20 @@ static int
i915_wait_request(struct drm_device *dev, uint32_t seqno)
{
drm_i915_private_t *dev_priv = dev->dev_private;
+ u32 ier;
int ret = 0;
BUG_ON(seqno == 0);
if (!i915_seqno_passed(i915_get_gem_seqno(dev), seqno)) {
+ ier = I915_READ(IER);
+ if (!ier) {
+ DRM_ERROR("something (likely vbetool) disabled "
+ "interrupts, re-enabling\n");
+ i915_driver_irq_preinstall(dev);
+ i915_driver_irq_postinstall(dev);
+ }
+
dev_priv->mm.waiting_gem_seqno = seqno;
i915_user_irq_get(dev);
ret = wait_event_interruptible(dev_priv->irq_queue,