[PATCH 13/13] ASoC: mediatek: mt8189: Validate TDM MCLK frequency

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

mtk_dai_tdm_cal_mclk() accepts zero or negative frequencies.
Reject invalid frequencies before configuring the TDM clock.

Fixes: 9f202872ba04 ("ASoC: mediatek: mt8189: support TDM in platform driver")
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/mediatek/mt8189/mt8189-dai-tdm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/mediatek/mt8189/mt8189-dai-tdm.c b/sound/soc/mediatek/mt8189/mt8189-dai-tdm.c
index 1b51027c6cf4..7748b4ff2c72 100644
--- a/sound/soc/mediatek/mt8189/mt8189-dai-tdm.c
+++ b/sound/soc/mediatek/mt8189/mt8189-dai-tdm.c
@@ -381,6 +381,9 @@ static int mtk_dai_tdm_cal_mclk(struct mtk_base_afe *afe,
 	int apll;
 	int apll_rate;
 
+	if (freq <= 0)
+		return -EINVAL;
+
 	apll = mt8189_get_apll_by_rate(afe, freq);
 	apll_rate = mt8189_get_apll_rate(afe, apll);
 
-- 
2.43.0