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mmc: debugfs: Add a restriction to mmc debugfs clock setting
Clock frequency values written to an mmc host should not be less than the minimum clock frequency which the mmc host supports. Signed-off-by: Yuan Juntao <juntaox.yuan@intel.com> Signed-off-by: Pawel Wodkowski <pawelx.wodkowski@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -220,7 +220,7 @@ static int mmc_clock_opt_set(void *data, u64 val)
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struct mmc_host *host = data;
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struct mmc_host *host = data;
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/* We need this check due to input value is u64 */
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/* We need this check due to input value is u64 */
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if (val > host->f_max)
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if (val != 0 && (val > host->f_max || val < host->f_min))
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return -EINVAL;
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return -EINVAL;
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mmc_claim_host(host);
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mmc_claim_host(host);
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