drm/i915: Don't let an oops get triggered from irq_emit without dma init.
authorEric Anholt <eric@anholt.net>
Thu, 16 Apr 2009 20:46:12 +0000 (13:46 -0700)
committerEric Anholt <eric@anholt.net>
Fri, 17 Apr 2009 20:30:50 +0000 (13:30 -0700)
Userland is broken if it's trying this, but we also shouldn't allow oopses.

Signed-off-by: Eric Anholt <eric@anholt.net>

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