[coreboot-gerrit] Patch merged into coreboot/master: 5b1c328 libpayload EHCI: Add memory barrier to EHCI driver

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit 5b1c328619ef9fcc533acf8cd1cf21ab4913b50b
Author: Furquan Shaikh <furquan at google.com>
Date:   Sun Aug 24 23:07:43 2014 -0700

    libpayload EHCI: Add memory barrier to EHCI driver
    
    EHCI driver accesses mmio space using regular struct pointers. In order to avoid
    any CPU re-ordering, memory barrier is required in async_set_schedule,
    especially for arm64. Without the memory barrier, there seems to be re-ordering
    taking place which leads to USB errors with some flash drives as well as
    transfer errors in netboot.
    
    BUG=chrome-os-partner:31533
    BRANCH=None
    TEST=With the memory barrier introduced, netboot for ryu completes transfer
    without any error and finishes within 6-7 seconds.
    
    Change-Id: Ib6d29dc79fd5722c27284478e8da316929e86bff
    Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
    Original-Commit-Id: 561bdd746c4d4446ce0a6d21337d354625d85ddc
    Original-Change-Id: Ic05d47422312a1cddbebe3180f4f159853604440
    Original-Signed-off-by: Furquan Shaikh <furquan at google.com>
    Original-Reviewed-on: https://chromium-review.googlesource.com/213917
    Original-Reviewed-by: Aaron Durbin <adurbin at chromium.org>
    Original-Tested-by: Furquan Shaikh <furquan at chromium.org>
    Original-Commit-Queue: Furquan Shaikh <furquan at chromium.org>
    Reviewed-on: http://review.coreboot.org/8732
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer <stefan.reinauer at coreboot.org>


See http://review.coreboot.org/8732 for details.

-gerrit