tree 8e5e6b97696da7c23de2e9f9df0ffbc1660d9f49
parent 541f29aad766b6c7b911a7d900d952744369bf53
author =?utf-8?q?Michel_D=C3=A4nzer?= <michel@tungstengraphics.com> 1161698903 +1000
committer airlied <airlied@linux.ie> 1165467210 +1100

drm: Make handling of dev_priv->vblank_pipe more robust.

Initialize it to default value if it hasn't been set by the X server yet.

In i915_vblank_pipe_set(), only update dev_priv->vblank_pipe and call
i915_enable_interrupt() if the argument passed from userspace is valid to avoid
corrupting dev_priv->vblank_pipe on invalid arguments.

Signed-off-by: Dave Airlie <airlied@linux.ie>