Re: FW: xhci ASMedia lockups - a theory and a patch

2014-01-30 Thread renevant
Hello, This will be the last post from me on this, at least for a while, out of my depth with this stuff. I have Linus' tree up and running with patches recommended by Sarah. "1. Disable scatter-gather for the ax88179_178a driver when it's under an xHCI host. 2. Revert the following commits

Re: FW: xhci ASMedia lockups - a theory and a patch

2014-01-30 Thread renevant
An update, iommu=pt made no difference in the end the system still came down eventually. So i've started from scratch. Cloned linus' tree merged "for-usb-linus-3.14" from the xhci tree applied the latest patch I saw from david on the list: http://www.spinics.net/lists/linux-usb/msg101747.htm

RE: FW: xhci ASMedia lockups - a theory and a patch

2014-01-30 Thread David Laight
From: Sarah Sharp > On Wed, Jan 29, 2014 at 03:48:27PM +, David Laight wrote: > > I've decided to forward this to the list. > > If you read further down he says that my patch makes the operation > > of the ax88179_178a stable - once the system has recognised it properly. > > I don't understand

Re: FW: xhci ASMedia lockups - a theory and a patch

2014-01-30 Thread renevant
It looks like the issue with being unable to get the device to work at all is limited to the Asmedia controller. I plugged a VL800-Q8 based pcie card in and got 117MB/s when sending and receiving with scp. This is with kernel 3.12.9 I guess it's possible that the ax88179 never worked with the

Re: FW: xhci ASMedia lockups - a theory and a patch

2014-01-29 Thread Sarah Sharp
[Please don't drop Cc'ed people.] On Thu, Jan 30, 2014 at 10:29:33AM +1100, renev...@internode.on.net wrote: > The patch did prevent the whole system from crashing but I have to unplug and > plug something like 20 times to get it not to spit out those error messages. > > Even once it is up, it d

Re: FW: xhci ASMedia lockups - a theory and a patch

2014-01-29 Thread Sarah Sharp
On Wed, Jan 29, 2014 at 03:48:27PM +, David Laight wrote: > I've decided to forward this to the list. > If you read further down he says that my patch makes the operation > of the ax88179_178a stable - once the system has recognised it properly. I don't understand why your patch helped. This

Re: FW: xhci ASMedia lockups - a theory and a patch

2014-01-29 Thread renevant
The patch did prevent the whole system from crashing but I have to unplug and plug something like 20 times to get it not to spit out those error messages. Even once it is up, it doesn't operate at full gigabit speed and there is something funky going on. When sending via scp it maxed out at 36MB