[PATCH 2/2] mmc: sdhci-of-aspeed: Fix clock divider calculation

[Ulf Hansson]

On Thu, 9 Jul 2020 at 21:57, Eddie James <eajames at linux.ibm.com> wrote:
>
> When calculating the clock divider, start dividing at 2 instead of 1.
> The divider is divided by two at the end of the calculation, so starting
> at 1 may result in a divider of 0, which shouldn't happen.
>
> Signed-off-by: Eddie James <eajames at linux.ibm.com>

Applied for fixes and by adding a stable tag for v5.4+, thanks!

Kind regards
Uffe




> ---
>  drivers/mmc/host/sdhci-of-aspeed.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-aspeed.c b/drivers/mmc/host/sdhci-of-aspeed.c
> index 56912e30c47e..a1bcc0f4ba9e 100644
> --- a/drivers/mmc/host/sdhci-of-aspeed.c
> +++ b/drivers/mmc/host/sdhci-of-aspeed.c
> @@ -68,7 +68,7 @@ static void aspeed_sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
>         if (WARN_ON(clock > host->max_clk))
>                 clock = host->max_clk;
>
> -       for (div = 1; div < 256; div *= 2) {
> +       for (div = 2; div < 256; div *= 2) {
>                 if ((parent / div) <= clock)
>                         break;
>         }
> --
> 2.24.0
>