Damien George d8057c325a stm32/storage: Change storage_read/write_blocks to return int type.
And return -MP_EIO if calling storage_read_block/storage_write_block fails.
This lines up with the return type and value (negative for error) of the
calls to MICROPY_HW_BDEV_READBLOCKS (and WRITEBLOCKS, and BDEV2 versions).
2019-11-26 00:08:57 +11:00
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