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-rw-r--r--drivers/gpu/drm/drm_irq.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 724e505873c..477caa1b1e4 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -267,7 +267,8 @@ EXPORT_SYMBOL(drm_irq_install);
*/
int drm_irq_uninstall(struct drm_device * dev)
{
- int irq_enabled;
+ unsigned long irqflags;
+ int irq_enabled, i;
if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
return -EINVAL;
@@ -277,6 +278,16 @@ int drm_irq_uninstall(struct drm_device * dev)
dev->irq_enabled = 0;
mutex_unlock(&dev->struct_mutex);
+ /*
+ * 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;
+ }
+ spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
+
if (!irq_enabled)
return -EINVAL;
@@ -652,8 +663,9 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
vblwait->request.sequence, crtc);
dev->last_vblank_wait[crtc] = vblwait->request.sequence;
DRM_WAIT_ON(ret, dev->vbl_queue[crtc], 3 * DRM_HZ,
- ((drm_vblank_count(dev, crtc)
- - vblwait->request.sequence) <= (1 << 23)));
+ (((drm_vblank_count(dev, crtc) -
+ vblwait->request.sequence) <= (1 << 23)) ||
+ !dev->irq_enabled));
if (ret != -EINTR) {
struct timeval now;