tree 02ebbd9f93a2f66cdbd9d6003b9fa2e860574586
parent 6b3943f1b04be60f147ee540fbd72c4c7ea89f80
author Marcin Niestroj <m.niestroj@grinn-global.com> 1464094795 +0200
committer Heiko Schocher <hs@denx.de> 1465792880 +0200

common: env_ubi: Clear environment buffer before reading

In case we have restarted u-boot there is a chance that environment
buffer contains old environment (from the previous boot). If UBI volume
is zero size, ubi_volume_read() doesn't modify the buffer and exits
successfully.

We need to clear buffer manually before reading it from UBI, so the
invalid CRC will cause setting default environment in case that the UBI
volume is zero size.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>