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ASoC: DAPM: Replace sprintf() calls with sysfs_emit_at() 

For sysfs outputs, it's safer to use a new helper, sysfs_emit(),
instead of the raw sprintf() & co.  This patch replaces the open-code
with a new helper, sysfs_emit_at(), by passing the string offset.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20220801170108.26340-8-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Takashi Iwai 2022-08-01 19:01:07 +02:00 committed by Mark Brown
parent 628d0f72d5
commit 69f7cbfb08
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 5 deletions
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9
sound/soc/soc-dapm.c
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@ -2386,11 +2386,10 @@ int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
char *buf)
char *buf, int count)
{
struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
struct snd_soc_dapm_widget *w;
int count = 0;
char *state = "not set";
/* card won't be set for the dummy component, as a spot fix
@ -2423,7 +2422,7 @@ static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
case snd_soc_dapm_pinctrl:
case snd_soc_dapm_clock_supply:
if (w->name)
count += sprintf(buf + count, "%s: %s\n",
count += sysfs_emit_at(buf, count, "%s: %s\n",
w->name, w->power ? "On":"Off");
break;
default:
@ -2445,7 +2444,7 @@ static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt,
state = "Off";
break;
}
count += sprintf(buf + count, "PM State: %s\n", state);
count += sysfs_emit_at(buf, count, "PM State: %s\n", state);
return count;
}
@ -2463,7 +2462,7 @@ static ssize_t dapm_widget_show(struct device *dev,
for_each_rtd_codec_dais(rtd, i, codec_dai) {
struct snd_soc_component *cmpnt = codec_dai->component;
count += dapm_widget_show_component(cmpnt, buf + count);
count = dapm_widget_show_component(cmpnt, buf, count);
}
mutex_unlock(&rtd->card->dapm_mutex);