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ASoC: stm: Prevent potential division by zero in stm32_sai_get_clk_div()
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 is safe to perform. Signed-off-by: Luo Yifan <luoyifan@cmss.chinamobile.com> Reviewed-by: Olivier Moysan <olivier.moysan@foss.st.com> Link: https://patch.msgid.link/20241107015936.211902-1-luoyifan@cmss.chinamobile.com Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -317,7 +317,7 @@ static int stm32_sai_get_clk_div(struct stm32_sai_sub_data *sai,
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int div;
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div = DIV_ROUND_CLOSEST(input_rate, output_rate);
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if (div > SAI_XCR1_MCKDIV_MAX(version)) {
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if (div > SAI_XCR1_MCKDIV_MAX(version) || div <= 0) {
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dev_err(&sai->pdev->dev, "Divider %d out of range\n", div);
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return -EINVAL;
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}
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