diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 9 |
2 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 52a3785a3fdf..35874b3a86dc 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1236,6 +1236,13 @@ typedef struct drm_i915_private { unsigned int fsb_freq, mem_freq, is_ddr3; + /** + * wq - Driver workqueue for GEM. + * + * NOTE: Work items scheduled here are not allowed to grab any modeset + * locks, for otherwise the flushing done in the pageflip code will + * result in deadlocks. + */ struct workqueue_struct *wq; /* Display functions */ diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 4c6853f57d62..9e48cf27db5e 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1027,8 +1027,13 @@ static inline void intel_hpd_irq_handler(struct drm_device *dev, dev_priv->display.hpd_irq_setup(dev); spin_unlock(&dev_priv->irq_lock); - queue_work(dev_priv->wq, - &dev_priv->hotplug_work); + /* + * Our hotplug handler can grab modeset locks (by calling down into the + * fb helpers). Hence it must not be run on our own dev-priv->wq work + * queue for otherwise the flush_work in the pageflip code will + * deadlock. + */ + schedule_work(&dev_priv->hotplug_work); } static void gmbus_irq_handler(struct drm_device *dev) |
