diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 23fb2c3..d84c880 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -708,7 +708,13 @@
 	 */
 	mmc_delay(10);
 
-	host->ios.clock = host->f_min;
+	if (host->f_min > 400000) {
+		pr_warning("%s: Minimum clock frequency too high for "
+				"identification mode\n", mmc_hostname(host));
+		host->ios.clock = host->f_min;
+	} else
+		host->ios.clock = 400000;
+
 	host->ios.power_mode = MMC_POWER_ON;
 	mmc_set_ios(host);