tree 7ac844375545e21181ac4e85dff1ebd838783439
parent ff24dc36ca2b449a8c089a1c6e43314c95edc042
author Marek Vasut <marex@denx.de> 1333937580 +0200
committer Marek Vasut <marex@denx.de> 1337495552 +0200

USB: Document the QH and qTD antics in EHCI-HCD

The construction of QH and qTD lists in ehci_submit_async() call is cryptic
business, add at least a bit of comments so if someone is reading it, he can at
least reference the intel ehci manual (ehci-r10.pdf).

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>