tree b45ce12c0b6a4561ccba3f6327d98aa5af864c2a
parent 17bb34a3c548c4fd2a7c859123a631f97c2af09f
author Jeff Garzik <jeff@garzik.org> 1142994682 -0500
committer Jeff Garzik <jeff@garzik.org> 1142994682 -0500

[libata] fix oops on non-DMA bmdma hardware

Alan noted: "bmdma may be zero but the bmdma_irq_clear function gets
called even in this case during pure PIO operation. Check we have a
bmdma before we use it."

I fixed this by adding a check for zero.  While was I there, I fixed the
non-standard indentation of the small function's code.

Signed-off-by: Jeff Garzik <jeff@garzik.org>