bugfix: retry_limit was never actually triggered during the data transfer phase because errors never accumulated, and
enhancement: replace 3x getc() calls with a single recv() call, reducing timing and failed packets when using fast serial lines without flow control.
Signed-off-by: Liu Yiding <liuyd.fnst@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
