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SubjectDMA blacklist for buggy hardware?
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I'm aware that there is a DMA blacklist for certain hardware that cant get 
along with standard DMA drivers in linux and indeed certain hardware that
doesn't get along in my OS's when using dma. One such drive is the Kenwood
TrueX cdroms. There are lots of problems documented with these drives and
dma usage. I have one and i've had problems when using it in DMA mode for
years. I suggest putting them on the blacklist so enabling DMA to these
drives is not possible to make sure problems with system use aren't due to
this. Enabling DMA on this line of drives can cause infinite atapi reset
loops on some kernels, dma timeouts that can bring a system to a halt until
it eventually resets and data corruption. The latest kernels seem to behave
much better when errors result from enabling dma on this drive but in the
past that hasn't been the case and there is still the reset which effects the
other drive on the controller as well. Thanks.
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