[PATCH] ARM: compress: Fix the debug prints

[Russell King - ARM Linux admin]

On Fri, Aug 07, 2020 at 02:26:56PM +0200, Linus Walleij wrote:
> @@ -49,8 +49,10 @@
>  
>  #include CONFIG_DEBUG_LL_INCLUDE
>  
> -		.macro	writeb,	ch, rb
> +		.macro	writeb,	ch, rb, tmp
> +		waituart \tmp, \rb
>  		senduart \ch, \rb
> +		busyuart \tmp, \rb
>  		.endm

This could likely cause problems.

waituart does things such as waiting for CTS to be asserted, and we
really don't want to block the decompressor if CTS is deasserted.

busyuart should be mostly fine though, provided the UART is actually
functional.

We haven't used either of these, we've relied on a software loop to
wait some time before queueing the next character.

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