Unstopable ata1: FAILURE - non aligned DMA transfer attempted loop

[Anish Mistry]

When trying to access a bad DVD I get the following messages that loop 
forever until I reboot the machine.  The drive is unresponsive so 
that's the only way to remove the disc.  Any ideas?

http://am-productions.biz/debug/pciconf.txt

Running a recent -CURRENT.  I'm also getting this same issue on 
RELENG_7 on a different machine.

Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed
Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed
Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed
Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed
Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed
Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed
Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed
Oct 31 12:01:29 littleguy kernel: ata1: FAILURE - non aligned DMA 
transfer attempted
Oct 31 12:01:29 littleguy kernel: acd0: setting up DMA failed

-- 
Anish Mistry
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