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authorThierry Reding <thierry.reding@avionic-design.de>2013-01-14 16:05:56 +0000
committerDave Airlie <airlied@redhat.com>2013-02-08 13:53:04 +1000
commit03f6509df9218c760ae74f41a609233220d33f19 (patch)
tree4c16f69a8ae54a6ffafd0c285afe165f63cd086b /drivers/gpu/drm/drm_irq.c
parent1e6d17a5df848cf8e483b689c6295776e9d6d997 (diff)
downloadop-kernel-dev-03f6509df9218c760ae74f41a609233220d33f19.zip
op-kernel-dev-03f6509df9218c760ae74f41a609233220d33f19.tar.gz
drm: Allow vblank support without DRIVER_HAVE_IRQ
Drivers that register interrupt handlers without the DRM core helpers don't initialize the .irq_enabled field and drm_dev_to_irq() may fail when called on them. This shouldn't preclude them from implementing the vblank IOCTL. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_irq.c')
-rw-r--r--drivers/gpu/drm/drm_irq.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 19c01ca..71f8205 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -1218,8 +1218,9 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
int ret;
unsigned int flags, seq, crtc, high_crtc;
- if ((!drm_dev_to_irq(dev)) || (!dev->irq_enabled))
- return -EINVAL;
+ if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
+ if ((!drm_dev_to_irq(dev)) || (!dev->irq_enabled))
+ return -EINVAL;
if (vblwait->request.type & _DRM_VBLANK_SIGNAL)
return -EINVAL;
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