[PATCH] ASoC: wm_adsp: Use scnprintf() for the limited buffer output

[Takashi Iwai]

snprintf() is a hard-to-use function, it's especially difficult to use
it for concatenating substrings in a buffer with a limited size.
Since snprintf() returns the would-be-output size, not the actual
size, the subsequent use of snprintf() may point to the incorrect
position.

Use scnprintf() instead for fixing such potential errors.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/soc/codecs/wm_adsp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index d3d32b501aca..ffb9836e0538 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -1436,12 +1436,12 @@ static int wm_adsp_create_control(struct wm_adsp *dsp,
 		subname = NULL; /* don't append subname */
 		break;
 	case 2:
-		ret = snprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN,
+		ret = scnprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN,
 				"%s%c %.12s %x", dsp->name, *region_name,
 				wm_adsp_fw_text[dsp->fw], alg_region->alg);
 		break;
 	default:
-		ret = snprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN,
+		ret = scnprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN,
 				"%s %.12s %x", dsp->name,
 				wm_adsp_fw_text[dsp->fw], alg_region->alg);
 		break;
-- 
2.16.4