tree 1b1cfd139dae8913b5fad9e76a2dc78329166666
parent 4f668311f1cd754a4d8e287afb4b9605ba4686a7
author Marek Vasut <marex@denx.de> 1333937266 +0200
committer Marek Vasut <marex@denx.de> 1337495552 +0200

USB: Drop cache flush bloat in EHCI-HCD

Discard the creepy cache flushing mechanisms in ehci-hcd.c and replace them with
more straightforward flushing. In the new approach, the flushing takes place
directly in ehci_submit_async() call instead of going through the QH list and
flushing all members and buffers. This discards a lot of weird bit operations
on the members of QH and qTD structures.

NOTE: Certainly, this flushes even qTDs which are possibly unused in some
transactions, though the overhead of the previous code was much higher than is
the overhead of flushing two more cache lines (which most probably aren't even
cached).

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