tree 7d547539278ea2c36ac63341777a00b63ad1e37e
parent d3e71ead6ea5bc3555ac90a446efec84ef6c6122
author Govindraj Raja <govindraj.raja@arm.com> 1684779762 -0500
committer Govindraj Raja <govindraj.raja@arm.com> 1684779762 -0500

fix(tsp): flush uart console

tsp uses uart2 and is printing some init messages in main, but
in certain situations we may exit tsp and may not have flushed
uart data, this could later land in uart fifo overflow or
random corruption.

Time to time we have seen a character corruption on uart2 arising
out of logs from tsp main.

So flush console messages from tsp_main before leaving the function.
This is inline with our uart usage strategy across TF-A as most
entry _main function ensures uart console is flushed before exit.

The console flush is harmless and should fix the potential character
corruption if it was due to tsp_main negligence.

But we cannot also rule out that it could be a potential FVP-UART
problem, but that's quite unlikely and further CI daily's will give
us a idea if this fixes the character corruption seen or we may need
stress test FVP-UART which maybe corrupting character in certain
circumstances.

Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
Change-Id: I300c6b71c00fa92b8b97b3e77ea936b393d0f7b5