4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Chuanxiao Dong <[email protected]> commit e5905ff1281f0a0f5c9863c430ac1ed5faaf5707 upstream. 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 <[email protected]> Signed-off-by: Pawel Wodkowski <[email protected]> Signed-off-by: Ulf Hansson <[email protected]> Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/mmc/core/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/mmc/core/debugfs.c +++ b/drivers/mmc/core/debugfs.c @@ -220,7 +220,7 @@ static int mmc_clock_opt_set(void *data, 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);
