Comment 61 for bug 1029790

I suffer from the same bug, and reported it here. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029790
I started doing bisect, but the commit that does this bug is already found, see https://bugzilla.redhat.com/show_bug.cgi?id=845745
and the commit is
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=2099810f903caa1920f3ef6014fb7f36e4786490 "pci bus mastering"

How to report that to upstreams?