USB: Document the QH and qTD antics in EHCI-HCD
authorMarek Vasut <marex@denx.de>
Mon, 9 Apr 2012 02:13:00 +0000 (04:13 +0200)
committerMarek Vasut <marex@denx.de>
Sun, 20 May 2012 06:32:32 +0000 (08:32 +0200)
commit41b1f0ac2e4c1d54807f90ae9aa2f2fad22a5151
tree7ac844375545e21181ac4e85dff1ebd838783439
parentb8adb12095814260d2b5edb23663ddf0ab97b877
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>
drivers/usb/host/ehci-hcd.c