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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2009-02-02 13:40:55 -0600 |
|---|---|---|
| committer | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2009-02-02 13:40:55 -0600 |
| commit | 8db0c5d5ef3ab99fe9e5151872b75f45c4282e3c (patch) | |
| tree | da9759151e00221c58cdd9f4de893c0b08753670 /drivers/gpu/drm/i915/i915_irq.c | |
| parent | 1ad53a98c927a9b5b1b57288ac0edec562fbcf8d (diff) | |
| parent | 45c82b5a770be66845687a7d027c8b52946d59af (diff) | |
Merge branch 'master' of /home/shaggy/git/linus-clean/
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 0cadafbef411..6290219de6c8 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)) |