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path: root/drivers/gpu/drm/drm_irq.c
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Diffstat (limited to 'drivers/gpu/drm/drm_irq.c')
-rw-r--r--drivers/gpu/drm/drm_irq.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index a6a8643a6a77..8bcce7866d36 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -1054,7 +1054,7 @@ EXPORT_SYMBOL(drm_vblank_off);
1054 */ 1054 */
1055void drm_vblank_pre_modeset(struct drm_device *dev, int crtc) 1055void drm_vblank_pre_modeset(struct drm_device *dev, int crtc)
1056{ 1056{
1057 /* vblank is not initialized (IRQ not installed ?) */ 1057 /* vblank is not initialized (IRQ not installed ?), or has been freed */
1058 if (!dev->num_crtcs) 1058 if (!dev->num_crtcs)
1059 return; 1059 return;
1060 /* 1060 /*
@@ -1076,6 +1076,10 @@ void drm_vblank_post_modeset(struct drm_device *dev, int crtc)
1076{ 1076{
1077 unsigned long irqflags; 1077 unsigned long irqflags;
1078 1078
1079 /* vblank is not initialized (IRQ not installed ?), or has been freed */
1080 if (!dev->num_crtcs)
1081 return;
1082
1079 if (dev->vblank_inmodeset[crtc]) { 1083 if (dev->vblank_inmodeset[crtc]) {
1080 spin_lock_irqsave(&dev->vbl_lock, irqflags); 1084 spin_lock_irqsave(&dev->vbl_lock, irqflags);
1081 dev->vblank_disable_allowed = 1; 1085 dev->vblank_disable_allowed = 1;