What's wrong with the driver for ATA/SATA?

[intron at intron.ac]

Today I csup-ed my kernel to the latest. But it doesn't work with
my SATA hard disk. I have to use old kernel (csup-ed on January 8th)
instead. My motherboard is Intel D510MO (Chipset: Intel NM10) and
a SATA hard disk by Seagate is connected. The kernel messages of
problem are: 

Mar 18 19:21:38 origin1 kernel: ad4: WARNING - READ_DMA48 requeued due to 
channel reset LBA=445804382
Mar 18 19:21:38 origin1 kernel: ata2: FAILURE - already active DMA on this 
device
Mar 18 19:21:38 origin1 kernel: ata2: setting up DMA failed
Mar 18 19:21:38 origin1 kernel: ad4: WARNING - READ_DMA48 requeued due to 
channel reset LBA=434271550
Mar 18 19:21:38 origin1 kernel: ata2: FAILURE - already active DMA on this 
device
Mar 18 19:21:38 origin1 kernel: ata2: setting up DMA failed
Mar 18 19:21:38 origin1 kernel: 
g_vfs_done():ad4s4a[READ(offset=19145261056, length=16384)]error = 5 


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    来自中国北京                               >From Beijing, China