diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index abf36acb2641..0482920a7968 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -216,6 +216,8 @@ static void tmio_mmc_reset_work(struct work_struct *work)
 	else
 		mrq->cmd->error = -ETIMEDOUT;
 
+	/* No new calls yet, but disallow concurrent tmio_mmc_done_work() */
+	host->mrq = ERR_PTR(-EBUSY);
 	host->cmd = NULL;
 	host->data = NULL;