Merge branch 'linux-linaro-lsk-v4.4-android' of git://git.linaro.org/kernel/linux...

[firefly-linux-kernel-4.4.55.git] / drivers / mmc / host / sdhci.c

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6e13fa8471bf253980ccdfa6c529f858058cb6f4..5031d4fa068f61d82d14d81570982eaa2e63e09c 100644 (file)
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -666,9 +666,20 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd)
        if (!data)
                target_timeout = cmd->busy_timeout * 1000;
        else {
-               target_timeout = data->timeout_ns / 1000;
-               if (host->clock)
-                       target_timeout += data->timeout_clks / host->clock;
+               target_timeout = DIV_ROUND_UP(data->timeout_ns, 1000);
+               if (host->clock && data->timeout_clks) {
+                       unsigned long long val;
+
+                       /*
+                        * data->timeout_clks is in units of clock cycles.
+                        * host->clock is in Hz.  target_timeout is in us.
+                        * Hence, us = 1000000 * cycles / Hz.  Round up.
+                        */
+                       val = 1000000 * data->timeout_clks;
+                       if (do_div(val, host->clock))
+                               target_timeout++;
+                       target_timeout += val;
+               }
        }
 
        /*