cmd: ubi: change all positive error return value to negative

Change all return value using errno codes to negative. This makes it
consistent with the linux ubi layer.

Also, to follow the standard definition of U-Boot command, in the do_ubi()
command handler, the return value is converted to CMD_RET_FAILURE for error
returning, and CMD_RET_USAGE for incorrect usage.

Reviewed-by: Simon Glass <[email protected]>
Signed-off-by: Weijie Gao <[email protected]>

0 files changed, 0 insertions, 0 deletions