[PATCH v2] net: tftp: Avoid sending extra ack on completion

[Oliver Graute]

On 03/02/21, Ramon Fried wrote:
> in tftpboot, if ack was already sent previously for this
> packet, don't send again.
> 
> Fixes: cc6b87ecaa96 ("net: tftp: Add client support for RFC 7440")
> 
> Reported-by: Suneel Garapati <suneelglinux at gmail.com>
> Signed-off-by: Ramon Fried <rfried.dev at gmail.com>

Tested-by: Oliver Graute <oliver.graute at kococonnector.com>