diff options
| author | Chuanxiao Dong <chuanxiao.dong@intel.com> | 2016-01-21 13:57:51 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-02-29 11:02:49 +0100 |
| commit | e5905ff1281f0a0f5c9863c430ac1ed5faaf5707 (patch) | |
| tree | 30a9f4fb0e22da3d3781af18681e18fc02fea209 /drivers/mmc | |
| parent | 1d6ad05777c27c7e8cfb32997a78c8252b85fbb4 (diff) | |
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>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/debugfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c index 65cc0ac9b82d..9382a57a5aa4 100644 --- a/drivers/mmc/core/debugfs.c +++ b/drivers/mmc/core/debugfs.c @@ -220,7 +220,7 @@ static int mmc_clock_opt_set(void *data, u64 val) struct mmc_host *host = data; /* We need this check due to input value is u64 */ - if (val > host->f_max) + if (val != 0 && (val > host->f_max || val < host->f_min)) return -EINVAL; mmc_claim_host(host); |