From: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
---
drivers/gpu/drm/drm_irq.c | 15 +++++++++------
1 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 2022a5c..c3c87a1 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -397,13 +397,16 @@ int drm_irq_uninstall(struct drm_device *dev)
/*
* Wake up any waiters so they don't hang.
*/
- spin_lock_irqsave(&dev->vbl_lock, irqflags);
- for (i = 0; i < dev->num_crtcs; i++) {
- DRM_WAKEUP(&dev->vbl_queue[i]);
- dev->vblank_enabled[i] = 0;
- dev->last_vblank[i] = dev->driver->get_vblank_counter(dev, i);
+ if (dev->num_crtcs) {
+ spin_lock_irqsave(&dev->vbl_lock, irqflags);
+ for (i = 0; i < dev->num_crtcs; i++) {
+ DRM_WAKEUP(&dev->vbl_queue[i]);
+ dev->vblank_enabled[i] = 0;
+ dev->last_vblank[i] =
+ dev->driver->get_vblank_counter(dev, i);
+ }
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
}
- spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
if (!irq_enabled)
return -EINVAL;
--
1.7.5.4
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