breadcrumbs:
; git remote add -f upstream <remote_addr>
; git fetch upstream
; git branch -t for_upstream upstream/<upstream_branch>
; git format-patch <optional parameters> HEAD^..
Open the patch file and strip out all of the Google-specific kruft (Bug, Test, Change-Id, etc). Once again, ensure you have a Signed-off-by: line in the commit message
Send the patch to the list
; git send-email --to=dri-devel@lists.freedesktop.org