On Mon, Oct 09, 2017 at 12:58:25PM +0300, Аладышев Константин wrote:
I try to port coreboot on boards with Haswell CPU and Lynxpoint LP chipset (IBASE IB908AF-4650 board, DFI HU968) and I've encountered a strange problem. USB devices stop working shortly after OS boot (or after USB device replug in OS) with flooding system with messages:
Interesting -- I ran into the exact same bug with Haswell while porting the NERF firmware and a 4.9.x kernel, and had attributed it to my not setting up something right. It's good to hear that maybe it isn't my fault (maybe).
[...] Through some digging I've found out that this problem persist on kernels <3.5. I've investigated this problem more closely and come down to the fact that the kernel commit that solves this problem is:
3d9545c EHCI: maintain the ehci->command value properly
https://github.com/torvalds/linux/commit/3d9545cc375d117554a9b35dfddadf9189c 62775?diff=split
Does it work if you back out that patch? For my purpose it might be enough to maintain a patch until we figure out what is really going on.