Re: dma error

It seems ryan chris wrote:
> versions this happened on:  4.8-release, 5.1-release, 5.1-current
> 
> with dma enabled, panics with anic errors occur left and right during
> intensive hdd i/o...  examples are during a non-minimal sysinstall, and
> during a tar -xvf of the entire ports collection
> 
> this is on an asus a7v-ve (
> http://www.hp.com/cposupport/personal_computing/support_doc/bph07371.html
> )
> 
> -bash-2.05b$ dmesg|grep atapci
> atapci0: <VIA 82C686B UDMA100 controller> port 0xd800-0xd80f at device 7.1
> on pci0
> atapci0: Correcting VIA config for southbridge data corruption bug
> ata0: at 0x1f0 irq 14 on atapci0
> ata1: at 0x170 irq 15 on atapci0
> atapci0: <VIA 82C686B UDMA100 controller> port 0xd800-0xd80f at device 7.1
> on pci0
> atapci0: Correcting VIA config for southbridge data corruption bug
> ata0: at 0x1f0 irq 14 on atapci0
> ata1: at 0x170 irq 15 on atapci0
> 
> disabling dma seemed to fix the problem

You have one of the bug ridden VIA 82c686B southbridges, and the normal
procedure for fixing this problem is to get a new BIOS that programs
the chipset correctly..

-Søren