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thermal: exynos: Propagate error value from tmu_read()
tmu_read() in case of Exynos4210 might return error for out of bound values. Current code ignores such value, what leads to reporting critical temperature value. Add proper error code propagation to exynos_get_temp() function. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> CC: stable@vger.kernel.org # v4.6+ Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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1 changed files with 7 additions and 2 deletions
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@ -892,6 +892,7 @@ static void exynos7_tmu_control(struct platform_device *pdev, bool on)
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static int exynos_get_temp(void *p, int *temp)
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{
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struct exynos_tmu_data *data = p;
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int value, ret = 0;
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if (!data || !data->tmu_read || !data->enabled)
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return -EINVAL;
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@ -899,12 +900,16 @@ static int exynos_get_temp(void *p, int *temp)
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mutex_lock(&data->lock);
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clk_enable(data->clk);
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*temp = code_to_temp(data, data->tmu_read(data)) * MCELSIUS;
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value = data->tmu_read(data);
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if (value < 0)
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ret = value;
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else
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*temp = code_to_temp(data, value) * MCELSIUS;
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clk_disable(data->clk);
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mutex_unlock(&data->lock);
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return 0;
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return ret;
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}
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#ifdef CONFIG_THERMAL_EMULATION
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