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42662f2214
The usb upgrade protocol is very fragile, any error while transferring
data causes the state machine on the target to lock up, and the only
way to resume the upgrade is to power cycle the device.
With this patch USB callbacks which happen more than 5 seconds since
the previous callback would be considered a start of new transfer,
thus allowing to attempt a new upgrade without the power cycle.
BRANCH=none
BUG=chrome-os-partner:52856
TEST=the following script allows to upgrade successfully:
$ while not ./extra/usb_updater/usb_updater build/cr50/ec.bin; do sleep 6; done
Change-Id: Ibe1078cf62073ce89a31416522b0d6917bc923b9
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/341572
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Mary Ruthven <mruthven@chromium.org>