linux-kernel - Re: [PATCH] ALSA: pcmtest: Extend error injection, decrease buffer filling overhead

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Date:   Thu, 13 Jul 2023 08:03:00 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Ivan Orlov <ivan.orlov0322@...il.com>
Cc:     perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: pcmtest: Extend error injection, decrease buffer filling overhead

On Wed, 12 Jul 2023 21:13:25 +0200,
Ivan Orlov wrote:
> 
> Extend 'pcmtest' virtual driver with 'open' callback error injection
> functionality, as it already can inject errors into other PCM callbacks.
> 
> Fix the driver to use already defined variables where it is possible.
> 
> Additionally, decrease the buffer filling overhead with conditional
> reminder calculation in the 'inc_buf_pos' inline function.
> 
> Signed-off-by: Ivan Orlov <ivan.orlov0322@...il.com>

Please avoid mixing different changes in a single patch.

This patch does three completely different things, and they should be
split. 

- New inject_open_err parameter
- Optimization of inc_buf_pos()
- Optimization of check_buf_block_ni() and fill_block_pattern_n()

The latter two could be put in a single patch as minor optimizations,
but the introduction of a new option doesn't fit with the rest.


thanks,

Takashi