tree 75f8e78ed4aeae85cbf991b32c07e0198b0f72e8
parent fe763e9820668b90c22b0101994ac6bd6cd41c09
author Andrew Jeffery <andrew@aj.id.au> 1664417791 +0930
committer Andrew Jeffery <andrew@aj.id.au> 1664861709 +1030

serial: Give write callbacks a consistent behaviour

Require that the write callbacks return either the number of bytes
written or a negative error code. From there, ensure the return value
behaviour is the same for the fd and custom handler paths.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Id9b90cf4e5c5815dc6385c3d493e2bbbd8e47616