[PATCH AUTOSEL 5.10 4/6] ASoC: stm: Prevent potential division by zero in stm32_sai_mclk_round_rate()
From: Sasha Levin
Date: Tue Nov 12 2024 - 06:36:38 EST
From: Luo Yifan <luoyifan@xxxxxxxxxxxxxxxxxxxx>
[ Upstream commit 63c1c87993e0e5bb11bced3d8224446a2bc62338 ]
This patch checks if div is less than or equal to zero (div <= 0). If
div is zero or negative, the function returns -EINVAL, ensuring the
division operation (*prate / div) is safe to perform.
Signed-off-by: Luo Yifan <luoyifan@xxxxxxxxxxxxxxxxxxxx>
Link: https://patch.msgid.link/20241106014654.206860-1-luoyifan@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/soc/stm/stm32_sai_sub.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c
index 3aa1cf2624020..3a7f0102b4c5c 100644
--- a/sound/soc/stm/stm32_sai_sub.c
+++ b/sound/soc/stm/stm32_sai_sub.c
@@ -380,8 +380,8 @@ static long stm32_sai_mclk_round_rate(struct clk_hw *hw, unsigned long rate,
int div;
div = stm32_sai_get_clk_div(sai, *prate, rate);
- if (div < 0)
- return div;
+ if (div <= 0)
+ return -EINVAL;
mclk->freq = *prate / div;
--
2.43.0