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ASoC: stm: Prevent potential division by zero in stm32_sai_mclk_round_rate()

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[ 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@cmss.chinamobile.com>
Link: https://patch.msgid.link/20241106014654.206860-1-luoyifan@cmss.chinamobile.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Luo Yifan 2024-11-06 09:46:54 +08:00 • committed by Greg Kroah-Hartman
parent 43cec71ce2
commit 05fc0c3d6f
1 changed files with 2 additions and 2 deletions
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4
sound/soc/stm/stm32_sai_sub.c
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@ -379,8 +379,8 @@ 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;