diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c
index bbae5a220219836658d3c52ff8460591a855ed62..e1a2e413eb7dae5c6978dbb3fdc44fcbc1f20a3e 100644
--- a/drivers/serial/dz.c
+++ b/drivers/serial/dz.c
@@ -685,7 +685,7 @@ static void dz_console_putchar(struct uart_port *uport, int ch)
 	iob();
 	spin_unlock_irqrestore(&dport->port.lock, flags);
 
-	while (loops--) {
+	do {
 		trdy = dz_in(dport, DZ_CSR);
 		if (!(trdy & DZ_TRDY))
 			continue;
@@ -696,7 +696,7 @@ static void dz_console_putchar(struct uart_port *uport, int ch)
 		dz_out(dport, DZ_TCR, mask);
 		iob();
 		udelay(2);
-	}
+	} while (loops--);
 
 	if (loops)				/* Cannot send otherwise. */
 		dz_out(dport, DZ_TDR, ch);