diff --git a/drivers/input/serio/ambakmi.c b/drivers/input/serio/ambakmi.c
index af159c7d60bcdb6c526589915b1f615cdc89b649..e29cdc13a199c007ab8ac6c6337086fe3685c5c4 100644
--- a/drivers/input/serio/ambakmi.c
+++ b/drivers/input/serio/ambakmi.c
@@ -57,7 +57,7 @@ static int amba_kmi_write(struct serio *io, unsigned char val)
 	struct amba_kmi_port *kmi = io->port_data;
 	unsigned int timeleft = 10000; /* timeout in 100ms */
 
-	while ((readb(KMISTAT) & KMISTAT_TXEMPTY) == 0 && timeleft--)
+	while ((readb(KMISTAT) & KMISTAT_TXEMPTY) == 0 && --timeleft)
 		udelay(10);
 
 	if (timeleft)