[U-Boot] [U-Boot, 2/4] serial: protect access to serial rx buffer

[Tom Rini]

On Fri, Aug 03, 2018 at 01:38:43PM +0200, Patrick Delaunay wrote:

> Add test to avoid access to rx buffer when this buffer is empty.
> In this case directly call getc() function to avoid issue when tstc()
> is not called.
> 
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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