Commit 0246c661 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown

ASoC: rsnd: use ring buffer for rsnd_mod_name()

commit c0ea089d ("ASoC: rsnd: rsnd_mod_name() handles both name and
ID") merged "name" and "ID" on rsnd_mod_name() to handle sub-ID
(= for CTU/BUSIF).
Then, it decided to share static char to avoid pointless memory.
But, it doesn't work correctry in below case, because last called
name will be used.

	dev_xxx(dev, "%s is connected to %s\n",
		rsnd_mod_name(mod_a),  /* ssiu[00] */
		rsnd_mod_name(mod_b)); /* ssi[0]   */
	->
	rcar_sound ec500000.sound: ssi[0] is connected to ssi[0]
	                           ~~~~~~                 ~~~~~~
We still don't want to have pointless memory, so let's use ring buffer.
16byte x 5 is very enough for this purpose.

	dev_xxx(dev, "%s is connected to %s\n",
		rsnd_mod_name(mod_a),  /* ssiu[00] */
		rsnd_mod_name(mod_b)); /* ssi[0]   */
	->
	rcar_sound ec500000.sound: ssiu[00] is connected to ssi[0]
	                           ~~~~~~~~                 ~~~~~~
Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d3ff06b0
...@@ -137,10 +137,17 @@ struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io, ...@@ -137,10 +137,17 @@ struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
return mod->ops->dma_req(io, mod); return mod->ops->dma_req(io, mod);
} }
#define MOD_NAME_NUM 5
#define MOD_NAME_SIZE 16 #define MOD_NAME_SIZE 16
char *rsnd_mod_name(struct rsnd_mod *mod) char *rsnd_mod_name(struct rsnd_mod *mod)
{ {
static char name[MOD_NAME_SIZE]; static char names[MOD_NAME_NUM][MOD_NAME_SIZE];
static int num;
char *name = names[num];
num++;
if (num >= MOD_NAME_NUM)
num = 0;
/* /*
* Let's use same char to avoid pointlessness memory * Let's use same char to avoid pointlessness memory
......
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