Hi,
just noticed the new sysctl variable for ata. I just wanted to
use the new way for disabling DMA on my disk (has some strange
problems, even under windows).
Previously I just commented out the ata_dmainit() lines in
ata_disk.c, now I wanted to set it with sysctl:
sysctl -w hw.atamodes="pio,dma,dma,dma"
but this paniced my machine.
I later discovered that there is no sanity check during setting
the new modes: The machine in question didn't have a secondary
IDE controller, but the variables were set without a range check.
My solution was simple. Just use
sysctl -w hw.atamodes="pio,dma"
but I think, the ata driver should range check the settings.
Daniel
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