diff options
| author | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2009-01-19 14:00:57 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@sgi.com> | 2009-01-19 14:00:57 +1100 |
| commit | 6c5200ce3c528a8f7695ee62f33ad84d8f84d444 (patch) | |
| tree | b240465c2dadbe0366a5b66d60c4776be1b7670d /drivers/gpu/drm/i915/i915_irq.c | |
| parent | 9d87c3192d96ef9ac1cec8321538e9b35e90b5aa (diff) | |
| parent | f3b8436ad9a8ad36b3c9fa1fe030c7f38e5d3d0b (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 0cadafbef41..6290219de6c 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -411,6 +411,12 @@ int i915_enable_vblank(struct drm_device *dev, int pipe) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; unsigned long irqflags; + int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF; + u32 pipeconf; + + pipeconf = I915_READ(pipeconf_reg); + if (!(pipeconf & PIPEACONF_ENABLE)) + return -EINVAL; spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags); if (IS_I965G(dev)) |